870640867631720 has 32 divisors (see below), whose sum is σ = 1960119908997120. Its totient is φ = 348046932505920.

The previous prime is 870640867631719. The next prime is 870640867631783. The reversal of 870640867631720 is 27136768046078.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

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, 6544137236 + ... + 6544270275.

It is an arithmetic number, because the mean of its divisors is an integer number (61253747156160).

Almost surely, 2^{870640867631720} is an apocalyptic number.

It is an amenable number.

870640867631720 is an abundant number, since it is smaller than the sum of its proper divisors (1089479041365400).

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

870640867631720 is a wasteful number, since it uses less digits than its factorization.

870640867631720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13088409185 (or 13088409181 counting only the distinct ones).

The product of its (nonzero) digits is 113799168, while the sum is 65.

The spelling of 870640867631720 in words is "eight hundred seventy trillion, six hundred forty billion, eight hundred sixty-seven million, six hundred thirty-one thousand, seven hundred twenty".