87739118865 has 32 divisors (see below), whose sum is σ = 156054159360. Its totient is φ = 46772145792.

The previous prime is 87739118851. The next prime is 87739118891. The reversal of 87739118865 is 56881193778.

87739118865 is a `hidden beast` number, since 8 + 7 + 7 + 391 + 188 + 65 = 666.

It is not a de Polignac number, because 87739118865 - 2⁵ = 87739118833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136432 + ... + 440558.

It is an arithmetic number, because the mean of its divisors is an integer number (4876692480).

Almost surely, 2^87739118865 is an apocalyptic number.

It is an amenable number.

87739118865 is a deficient number, since it is larger than the sum of its proper divisors (68315040495).

87739118865 is a wasteful number, since it uses less digits than its factorization.

87739118865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306278 (or 306272 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 63.

The spelling of 87739118865 in words is "eighty-seven billion, seven hundred thirty-nine million, one hundred eighteen thousand, eight hundred sixty-five".