15656656650 has 24 divisors (see below), whose sum is σ = 38828508864. Its totient is φ = 4175108400.

The previous prime is 15656656643. The next prime is 15656656667. The reversal of 15656656650 is 5665665651.

It is a junction number, because it is equal to n+sod(n) for n = 15656656593 and 15656656602.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52188706 + ... + 52189005.

It is an arithmetic number, because the mean of its divisors is an integer number (1617854536).

Almost surely, 2^15656656650 is an apocalyptic number.

15656656650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15656656650 is an abundant number, since it is smaller than the sum of its proper divisors (23171852214).

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

15656656650 is a wasteful number, since it uses less digits than its factorization.

15656656650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104377726 (or 104377721 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 51.

Subtracting from 15656656650 its reverse (5665665651), we obtain a palindrome (9990990999).

The spelling of 15656656650 in words is "fifteen billion, six hundred fifty-six million, six hundred fifty-six thousand, six hundred fifty".