870644056642647 has 32 divisors (see below), whose sum is σ = 1340640482517504. Its totient is φ = 492283645286400.

The previous prime is 870644056642631. The next prime is 870644056642651. The reversal of 870644056642647 is 746246650446078.

It is not a de Polignac number, because 870644056642647 - 2⁴ = 870644056642631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870644056642147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32440254 + ... + 52855067.

It is an arithmetic number, because the mean of its divisors is an integer number (41895015078672).

Almost surely, 2^{870644056642647} is an apocalyptic number.

870644056642647 is a deficient number, since it is larger than the sum of its proper divisors (469996425874857).

870644056642647 is a wasteful number, since it uses less digits than its factorization.

870644056642647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85300439.

The product of its (nonzero) digits is 1300561920, while the sum is 69.

The spelling of 870644056642647 in words is "eight hundred seventy trillion, six hundred forty-four billion, fifty-six million, six hundred forty-two thousand, six hundred forty-seven".