28177774875 has 96 divisors (see below), whose sum is σ = 52033093632. Its totient is φ = 14663880000.

The previous prime is 28177774843. The next prime is 28177774883. The reversal of 28177774875 is 57847777182.

28177774875 is a `hidden beast` number, since 2 + 81 + 7 + 7 + 77 + 487 + 5 = 666.

It is not a de Polignac number, because 28177774875 - 2⁵ = 28177774843 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24480550 + ... + 24481700.

It is an arithmetic number, because the mean of its divisors is an integer number (542011392).

Almost surely, 2^28177774875 is an apocalyptic number.

28177774875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28177774875 is a deficient number, since it is larger than the sum of its proper divisors (23855318757).

28177774875 is a wasteful number, since it uses less digits than its factorization.

28177774875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682 (or 1669 counting only the distinct ones).

The product of its digits is 43025920, while the sum is 63.

The spelling of 28177774875 in words is "twenty-eight billion, one hundred seventy-seven million, seven hundred seventy-four thousand, eight hundred seventy-five".