28161158456 has 16 divisors (see below), whose sum is σ = 52815267240. Its totient is φ = 14077087200.

The previous prime is 28161158447. The next prime is 28161158483. The reversal of 28161158456 is 65485116182.

It is a self number, because there is not a number n which added to its sum of digits gives 28161158456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402071 + ... + 466886.

Almost surely, 2^28161158456 is an apocalyptic number.

It is an amenable number.

28161158456 is a deficient number, since it is larger than the sum of its proper divisors (24654108784).

28161158456 is a wasteful number, since it uses less digits than its factorization.

28161158456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873014 (or 873010 counting only the distinct ones).

The product of its digits is 460800, while the sum is 47.

The spelling of 28161158456 in words is "twenty-eight billion, one hundred sixty-one million, one hundred fifty-eight thousand, four hundred fifty-six".