16656793920 has 168 divisors, whose sum is σ = 61699679496. Its totient is φ = 4100124672.

The previous prime is 16656793891. The next prime is 16656793931. The reversal of 16656793920 is 2939765661.

It can be written as a sum of positive squares in 4 ways, for example, as 4057180416 + 12599613504 = 63696^2 + 112248^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185007 + ... + 259886.

It is an arithmetic number, because the mean of its divisors is an integer number (367259997).

Almost surely, 2^16656793920 is an apocalyptic number.

16656793920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16656793920 is an abundant number, since it is smaller than the sum of its proper divisors (45042885576).

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

16656793920 is a wasteful number, since it uses less digits than its factorization.

16656793920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444929 (or 444916 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The spelling of 16656793920 in words is "sixteen billion, six hundred fifty-six million, seven hundred ninety-three thousand, nine hundred twenty".