28161167664 has 40 divisors (see below), whose sum is σ = 83142496000. Its totient is φ = 8046047808.

The previous prime is 28161167659. The next prime is 28161167701. The reversal of 28161167664 is 46676116182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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

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, 41906164 + ... + 41906835.

It is an arithmetic number, because the mean of its divisors is an integer number (2078562400).

Almost surely, 2^28161167664 is an apocalyptic number.

28161167664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28161167664 is an abundant number, since it is smaller than the sum of its proper divisors (54981328336).

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

28161167664 is a wasteful number, since it uses less digits than its factorization.

28161167664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83813017 (or 83813011 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The spelling of 28161167664 in words is "twenty-eight billion, one hundred sixty-one million, one hundred sixty-seven thousand, six hundred sixty-four".