28618780113 has 60 divisors (see below), whose sum is σ = 54252464112. Its totient is φ = 14866876080.

The previous prime is 28618780063. The next prime is 28618780117. The reversal of 28618780113 is 31108781682.

It is a happy number.

28618780113 is a `hidden beast` number, since 28 + 618 + 7 + 8 + 0 + 1 + 1 + 3 = 666.

It is not a de Polignac number, because 28618780113 - 2²⁵ = 28585225681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28618780117) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 284095 + ... + 371412.

Almost surely, 2^28618780113 is an apocalyptic number.

It is an amenable number.

28618780113 is a deficient number, since it is larger than the sum of its proper divisors (25633683999).

28618780113 is a wasteful number, since it uses less digits than its factorization.

28618780113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655544 (or 655528 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The spelling of 28618780113 in words is "twenty-eight billion, six hundred eighteen million, seven hundred eighty thousand, one hundred thirteen".