28774564755 has 16 divisors (see below), whose sum is σ = 46049974944. Its totient is φ = 15342877440.

The previous prime is 28774564739. The next prime is 28774564757. The reversal of 28774564755 is 55746547782.

It is not a de Polignac number, because 28774564755 - 2⁴ = 28774564739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28774564757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154786 + ... + 285495.

It is an arithmetic number, because the mean of its divisors is an integer number (2878123434).

Almost surely, 2^28774564755 is an apocalyptic number.

28774564755 is a deficient number, since it is larger than the sum of its proper divisors (17275410189).

28774564755 is a wasteful number, since it uses less digits than its factorization.

28774564755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444646.

The product of its digits is 65856000, while the sum is 60.

The spelling of 28774564755 in words is "twenty-eight billion, seven hundred seventy-four million, five hundred sixty-four thousand, seven hundred fifty-five".