16166987928 has 96 divisors (see below), whose sum is σ = 53889981600. Its totient is φ = 4263819264.

The previous prime is 16166987917. The next prime is 16166987953. The reversal of 16166987928 is 82978966161.

16166987928 is a `hidden beast` number, since 1 + 616 + 6 + 9 + 8 + 7 + 9 + 2 + 8 = 666.

It is a super-2 number, since 2×16166987928² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

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, 1227193 + ... + 1240296.

It is an arithmetic number, because the mean of its divisors is an integer number (561353975).

Almost surely, 2^16166987928 is an apocalyptic number.

16166987928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16166987928 is an abundant number, since it is smaller than the sum of its proper divisors (37722993672).

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

16166987928 is a wasteful number, since it uses less digits than its factorization.

16166987928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467521 (or 2467514 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 16166987928 in words is "sixteen billion, one hundred sixty-six million, nine hundred eighty-seven thousand, nine hundred twenty-eight".