870612346378721 has 4 divisors (see below), whose sum is σ = 873755351239572. Its totient is φ = 867469341517872.

The previous prime is 870612346378703. The next prime is 870612346378739. The reversal of 870612346378721 is 127873643216078.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (870612346378703) and next prime (870612346378739).

It can be written as a sum of positive squares in 2 ways, for example, as 210910587063121 + 659701759315600 = 14522761^2 + 25684660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870612346378721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870612346378771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571502430010 + ... + 1571502430563.

It is an arithmetic number, because the mean of its divisors is an integer number (218438837809893).

Almost surely, 2^{870612346378721} is an apocalyptic number.

It is an amenable number.

870612346378721 is a deficient number, since it is larger than the sum of its proper divisors (3143004860851).

870612346378721 is a wasteful number, since it uses less digits than its factorization.

870612346378721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143004860850.

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

The spelling of 870612346378721 in words is "eight hundred seventy trillion, six hundred twelve billion, three hundred forty-six million, three hundred seventy-eight thousand, seven hundred twenty-one".