870640867631721 has 8 divisors (see below), whose sum is σ = 1187851106226400. Its totient is φ = 566928937062432.

The previous prime is 870640867631719. The next prime is 870640867631783. The reversal of 870640867631721 is 127136768046078.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 870640867631721 - 2¹ = 870640867631719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870640867631701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3374577006196 + ... + 3374577006453.

It is an arithmetic number, because the mean of its divisors is an integer number (148481388278300).

Almost surely, 2^{870640867631721} is an apocalyptic number.

It is an amenable number.

870640867631721 is a deficient number, since it is larger than the sum of its proper divisors (317210238594679).

870640867631721 is a wasteful number, since it uses less digits than its factorization.

870640867631721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6749154012695.

The product of its (nonzero) digits is 113799168, while the sum is 66.

The spelling of 870640867631721 in words is "eight hundred seventy trillion, six hundred forty billion, eight hundred sixty-seven million, six hundred thirty-one thousand, seven hundred twenty-one".