870617525368621 has 2 divisors, whose sum is σ = 870617525368622. Its totient is φ = 870617525368620.

The previous prime is 870617525368553. The next prime is 870617525368627. The reversal of 870617525368621 is 126863525716078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 837394532572900 + 33222992795721 = 28937770^2 + 5763939^2 .

It is a cyclic number.

It is not a de Polignac number, because 870617525368621 - 2¹⁵ = 870617525335853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870617525368627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435308762684310 + 435308762684311.

It is an arithmetic number, because the mean of its divisors is an integer number (435308762684311).

Almost surely, 2^{870617525368621} is an apocalyptic number.

It is an amenable number.

870617525368621 is a deficient number, since it is larger than the sum of its proper divisors (1).

870617525368621 is an equidigital number, since it uses as much as digits as its factorization.

870617525368621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 203212800, while the sum is 67.

The spelling of 870617525368621 in words is "eight hundred seventy trillion, six hundred seventeen billion, five hundred twenty-five million, three hundred sixty-eight thousand, six hundred twenty-one".