28621163155 has 12 divisors (see below), whose sum is σ = 37190577600. Its totient is φ = 21135627552.

The previous prime is 28621163143. The next prime is 28621163203. The reversal of 28621163155 is 55136112682.

It is a de Polignac number, because none of the positive numbers 2^k-28621163155 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16934755 + ... + 16936444.

It is an arithmetic number, because the mean of its divisors is an integer number (3099214800).

Almost surely, 2^28621163155 is an apocalyptic number.

28621163155 is a deficient number, since it is larger than the sum of its proper divisors (8569414445).

28621163155 is a wasteful number, since it uses less digits than its factorization.

28621163155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33871230 (or 33871217 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The spelling of 28621163155 in words is "twenty-eight billion, six hundred twenty-one million, one hundred sixty-three thousand, one hundred fifty-five".