16557376988 has 24 divisors (see below), whose sum is σ = 30240054432. Its totient is φ = 7917476864.

The previous prime is 16557376973. The next prime is 16557376993. The reversal of 16557376988 is 88967375561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830756 + ... + 850452.

It is an arithmetic number, because the mean of its divisors is an integer number (1260002268).

Almost surely, 2^16557376988 is an apocalyptic number.

It is an amenable number.

16557376988 is a deficient number, since it is larger than the sum of its proper divisors (13682677444).

16557376988 is a wasteful number, since it uses less digits than its factorization.

16557376988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28861 (or 28859 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 65.

The spelling of 16557376988 in words is "sixteen billion, five hundred fifty-seven million, three hundred seventy-six thousand, nine hundred eighty-eight".