3646612500 has 144 divisors (see below), whose sum is σ = 10866804480. Its totient is φ = 951280000.

The previous prime is 3646612499. The next prime is 3646612531. The reversal of 3646612500 is 52166463.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1761466 + ... + 1763534.

It is an arithmetic number, because the mean of its divisors is an integer number (75463920).

Almost surely, 2^3646612500 is an apocalyptic number.

3646612500 is a gapful number since it is divisible by the number (30) 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 3646612500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5433402240).

3646612500 is an abundant number, since it is smaller than the sum of its proper divisors (7220191980).

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

3646612500 is a wasteful number, since it uses less digits than its factorization.

3646612500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148 (or 2126 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 3646612500 is about 60387.1882107455. The cubic root of 3646612500 is about 1539.2052598042.

Adding to 3646612500 its reverse (52166463), we get a palindrome (3698778963).

The spelling of 3646612500 in words is "three billion, six hundred forty-six million, six hundred twelve thousand, five hundred".