16557512976 has 45 divisors (see below), whose sum is σ = 46342361559. Its totient is φ = 5518656288.

The previous prime is 16557512971. The next prime is 16557513019. The reversal of 16557512976 is 67921575561.

The square root of 16557512976 is 128676.

It is a perfect power (a square), and thus also a powerful number.

16557512976 is a `hidden beast` number, since 1 + 6 + 5 + 57 + 512 + 9 + 76 = 666.

It is not an unprimeable number, because it can be changed into a prime (16557512971) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1538751 + ... + 1549473.

Almost surely, 2^16557512976 is an apocalyptic number.

16557512976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16557512976 is the 128676-th square number.

It is an amenable number.

16557512976 is an abundant number, since it is smaller than the sum of its proper divisors (29784848583).

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

16557512976 is an frugal number, since it uses more digits than its factorization.

16557512976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21460 (or 10728 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 54.

The spelling of 16557512976 in words is "sixteen billion, five hundred fifty-seven million, five hundred twelve thousand, nine hundred seventy-six".