87556531915 has 16 divisors (see below), whose sum is σ = 107022785760. Its totient is φ = 68753940480.

The previous prime is 87556531889. The next prime is 87556531973. The reversal of 87556531915 is 51913565578.

It is not a de Polignac number, because 87556531915 - 2⁵ = 87556531883 is a prime.

It is a super-2 number, since 2×87556531915² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 692406 + ... + 809035.

It is an arithmetic number, because the mean of its divisors is an integer number (6688924110).

Almost surely, 2^87556531915 is an apocalyptic number.

87556531915 is a deficient number, since it is larger than the sum of its proper divisors (19466253845).

87556531915 is a wasteful number, since it uses less digits than its factorization.

87556531915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501662.

The product of its digits is 5670000, while the sum is 55.

The spelling of 87556531915 in words is "eighty-seven billion, five hundred fifty-six million, five hundred thirty-one thousand, nine hundred fifteen".