87192918506 has 16 divisors (see below), whose sum is σ = 137691653760. Its totient is φ = 41296321440.

The previous prime is 87192918497. The next prime is 87192918517. The reversal of 87192918506 is 60581929178.

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, 136511 + ... + 439341.

It is an arithmetic number, because the mean of its divisors is an integer number (8605728360).

Almost surely, 2^87192918506 is an apocalyptic number.

87192918506 is a deficient number, since it is larger than the sum of its proper divisors (50498735254).

87192918506 is a wasteful number, since it uses less digits than its factorization.

87192918506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310429.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 87192918506 in words is "eighty-seven billion, one hundred ninety-two million, nine hundred eighteen thousand, five hundred six".