16512166656 has 72 divisors (see below), whose sum is σ = 48829402160. Its totient is φ = 5504053248.

The previous prime is 16512166651. The next prime is 16512166663. The reversal of 16512166656 is 65666121561.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (16512166651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1187545 + ... + 1201368.

Almost surely, 2^16512166656 is an apocalyptic number.

16512166656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16512166656 is an abundant number, since it is smaller than the sum of its proper divisors (32317235504).

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

16512166656 is an equidigital number, since it uses as much as digits as its factorization.

16512166656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388938 (or 2388918 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The spelling of 16512166656 in words is "sixteen billion, five hundred twelve million, one hundred sixty-six thousand, six hundred fifty-six".