28591116624 has 90 divisors (see below), whose sum is σ = 93079181130. Its totient is φ = 8168888448.

The previous prime is 28591116607. The next prime is 28591116637. The reversal of 28591116624 is 42661119582.

28591116624 is a `hidden beast` number, since 2 + 8 + 5 + 9 + 1 + 1 + 16 + 624 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28167580224 + 423536400 = 167832^2 + 20580^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28591116624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2018959 + ... + 2033070.

Almost surely, 2^28591116624 is an apocalyptic number.

28591116624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28591116624 is an abundant number, since it is smaller than the sum of its proper divisors (64488064506).

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

28591116624 is a wasteful number, since it uses less digits than its factorization.

28591116624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052057 (or 4052041 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 28591116624 in words is "twenty-eight billion, five hundred ninety-one million, one hundred sixteen thousand, six hundred twenty-four".