28757686155 has 16 divisors (see below), whose sum is σ = 50195234304. Its totient is φ = 13943120480.

The previous prime is 28757686123. The next prime is 28757686169. The reversal of 28757686155 is 55168675782.

It is not a de Polignac number, because 28757686155 - 2⁵ = 28757686123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87144339 + ... + 87144668.

It is an arithmetic number, because the mean of its divisors is an integer number (3137202144).

Almost surely, 2^28757686155 is an apocalyptic number.

28757686155 is a deficient number, since it is larger than the sum of its proper divisors (21437548149).

28757686155 is a wasteful number, since it uses less digits than its factorization.

28757686155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174289026.

The product of its digits is 28224000, while the sum is 60.

The spelling of 28757686155 in words is "twenty-eight billion, seven hundred fifty-seven million, six hundred eighty-six thousand, one hundred fifty-five".