87317312017872 has 80 divisors (see below), whose sum is σ = 227226456576000. Its totient is φ = 28892061109632.

The previous prime is 87317312017849. The next prime is 87317312017891. The reversal of 87317312017872 is 27871021371378.

It is a congruent number.

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, 43855279 + ... + 45803057.

It is an arithmetic number, because the mean of its divisors is an integer number (2840330707200).

Almost surely, 2^{87317312017872} is an apocalyptic number.

It is an amenable number.

87317312017872 is an abundant number, since it is smaller than the sum of its proper divisors (139909144558128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87317312017872 is a wasteful number, since it uses less digits than its factorization.

87317312017872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954648 (or 1954642 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 57.

The spelling of 87317312017872 in words is "eighty-seven trillion, three hundred seventeen billion, three hundred twelve million, seventeen thousand, eight hundred seventy-two".