87915799751978 has 16 divisors (see below), whose sum is σ = 144182623622400. Its totient is φ = 39872725536000.

The previous prime is 87915799751959. The next prime is 87915799752013.

It is a happy number.

87915799751978 is nontrivially palindromic in base 10.

87915799751978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4450071098 + ... + 4450090853.

It is an arithmetic number, because the mean of its divisors is an integer number (9011413976400).

Almost surely, 2^{87915799751978} is an apocalyptic number.

87915799751978 is a deficient number, since it is larger than the sum of its proper divisors (56266823870422).

87915799751978 is a wasteful number, since it uses less digits than its factorization.

87915799751978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900162413.

The product of its digits is 25204737600, while the sum is 92.

The spelling of 87915799751978 in words is "eighty-seven trillion, nine hundred fifteen billion, seven hundred ninety-nine million, seven hundred fifty-one thousand, nine hundred seventy-eight".