870578565121 has 2 divisors, whose sum is σ = 870578565122. Its totient is φ = 870578565120.

The previous prime is 870578565113. The next prime is 870578565173. The reversal of 870578565121 is 121565875078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 855800759025 + 14777806096 = 925095^2 + 121564^2 .

It is a cyclic number.

It is not a de Polignac number, because 870578565121 - 2³ = 870578565113 is a prime.

It is not a weakly prime, because it can be changed into another prime (870578965121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435289282560 + 435289282561.

It is an arithmetic number, because the mean of its divisors is an integer number (435289282561).

Almost surely, 2^870578565121 is an apocalyptic number.

It is an amenable number.

870578565121 is a deficient number, since it is larger than the sum of its proper divisors (1).

870578565121 is an equidigital number, since it uses as much as digits as its factorization.

870578565121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704000, while the sum is 55.

The spelling of 870578565121 in words is "eight hundred seventy billion, five hundred seventy-eight million, five hundred sixty-five thousand, one hundred twenty-one".