28479855177 has 8 divisors (see below), whose sum is σ = 42192378080. Its totient is φ = 18986570100.

The previous prime is 28479855163. The next prime is 28479855181. The reversal of 28479855177 is 77155897482.

28479855177 is a `hidden beast` number, since 2 + 8 + 4 + 7 + 9 + 8 + 551 + 77 = 666.

It is not a de Polignac number, because 28479855177 - 2¹⁸ = 28479593033 is a prime.

It is a super-2 number, since 2×28479855177² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28479855137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527404699 + ... + 527404752.

It is an arithmetic number, because the mean of its divisors is an integer number (5274047260).

Almost surely, 2^28479855177 is an apocalyptic number.

28479855177 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28479855177 is a deficient number, since it is larger than the sum of its proper divisors (13712522903).

28479855177 is a wasteful number, since it uses less digits than its factorization.

28479855177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054809460 (or 1054809454 counting only the distinct ones).

The product of its digits is 39513600, while the sum is 63.

The spelling of 28479855177 in words is "twenty-eight billion, four hundred seventy-nine million, eight hundred fifty-five thousand, one hundred seventy-seven".