16687604925 has 36 divisors (see below), whose sum is σ = 30031095744. Its totient is φ = 8857850400.

The previous prime is 16687604909. The next prime is 16687604933. The reversal of 16687604925 is 52940678661.

16687604925 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 7 + 604 + 9 + 25 = 666.

It is not a de Polignac number, because 16687604925 - 2⁴ = 16687604909 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 128277 + ... + 223226.

It is an arithmetic number, because the mean of its divisors is an integer number (834197104).

Almost surely, 2^16687604925 is an apocalyptic number.

16687604925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16687604925 is a deficient number, since it is larger than the sum of its proper divisors (13343490819).

16687604925 is a wasteful number, since it uses less digits than its factorization.

16687604925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351730 (or 351722 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 16687604925 in words is "sixteen billion, six hundred eighty-seven million, six hundred four thousand, nine hundred twenty-five".