3636363636 has 72 divisors (see below), whose sum is σ = 9451897728. Its totient is φ = 1178064000.

The previous prime is 3636363613. The next prime is 3636363637. The reversal of 3636363636 is 6363636363.

3636363636 is a `hidden beast` number, since 3 + 6 + 3 + 6 + 3 + 6 + 3 + 636 = 666.

3636363636 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between odd and even.

3636363636 is an undulating number in base 10.

3636363636 is a modest number, since divided by 363636 gives 3636 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 3636363591 and 3636363600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3636363637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 395451 + ... + 404541.

Almost surely, 2^3636363636 is an apocalyptic number.

3636363636 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3636363636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4725948864).

3636363636 is an abundant number, since it is smaller than the sum of its proper divisors (5815534092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3636363636 is a wasteful number, since it uses less digits than its factorization.

3636363636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9413 (or 9408 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 45.

The square root of 3636363636 is about 60302.2689125376. The cubic root of 3636363636 is about 1537.7619196060.

Adding to 3636363636 its reverse (6363636363), we get a palindrome (9999999999).

It can be divided in two parts, 36363 and 63636, that added together give a palindrome (99999).

The spelling of 3636363636 in words is "three billion, six hundred thirty-six million, three hundred sixty-three thousand, six hundred thirty-six".