3645451636 has 6 divisors (see below), whose sum is σ = 6379540370. Its totient is φ = 1822725816.

The previous prime is 3645451613. The next prime is 3645451637. The reversal of 3645451636 is 6361545463.

3645451636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1923699600 + 1721752036 = 43860^2 + 41494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3645451592 and 3645451601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645451637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455681451 + ... + 455681458.

Almost surely, 2^3645451636 is an apocalyptic number.

It is an amenable number.

3645451636 is a deficient number, since it is larger than the sum of its proper divisors (2734088734).

3645451636 is a wasteful number, since it uses less digits than its factorization.

3645451636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911362913 (or 911362911 counting only the distinct ones).

The product of its digits is 777600, while the sum is 43.

The square root of 3645451636 is about 60377.5756055176. The cubic root of 3645451636 is about 1539.0419120750.

The spelling of 3645451636 in words is "three billion, six hundred forty-five million, four hundred fifty-one thousand, six hundred thirty-six".