870612138252561 has 4 divisors (see below), whose sum is σ = 1160816184336752. Its totient is φ = 580408092168372.

The previous prime is 870612138252511. The next prime is 870612138252599. The reversal of 870612138252561 is 165252831216078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 870612138252561 - 2¹¹ = 870612138250513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870612138252511) 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, 145102023042091 + ... + 145102023042096.

It is an arithmetic number, because the mean of its divisors is an integer number (290204046084188).

Almost surely, 2^{870612138252561} is an apocalyptic number.

It is an amenable number.

870612138252561 is a deficient number, since it is larger than the sum of its proper divisors (290204046084191).

870612138252561 is a wasteful number, since it uses less digits than its factorization.

870612138252561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290204046084190.

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 870612138252561 in words is "eight hundred seventy trillion, six hundred twelve billion, one hundred thirty-eight million, two hundred fifty-two thousand, five hundred sixty-one".