16655825920 has 44 divisors (see below), whose sum is σ = 39954475944. Its totient is φ = 6662328320.

The previous prime is 16655825863. The next prime is 16655825941. The reversal of 16655825920 is 2952855661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1621426 + ... + 1631665.

Almost surely, 2^16655825920 is an apocalyptic number.

16655825920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16655825920 is an abundant number, since it is smaller than the sum of its proper divisors (23298650024).

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

16655825920 is an equidigital number, since it uses as much as digits as its factorization.

16655825920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253116 (or 3253098 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 49.

The spelling of 16655825920 in words is "sixteen billion, six hundred fifty-five million, eight hundred twenty-five thousand, nine hundred twenty".