870672782711581 has 2 divisors, whose sum is σ = 870672782711582. Its totient is φ = 870672782711580.

The previous prime is 870672782711551. The next prime is 870672782711593. The reversal of 870672782711581 is 185117287276078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 674674182709081 + 195998600002500 = 25974491^2 + 13999950^2 .

It is a cyclic number.

It is not a de Polignac number, because 870672782711581 - 2⁷ = 870672782711453 is a prime.

It is a super-2 number, since 2×870672782711581² (a number of 31 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 870672782711581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870672782711551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435336391355790 + 435336391355791.

It is an arithmetic number, because the mean of its divisors is an integer number (435336391355791).

Almost surely, 2^{870672782711581} is an apocalyptic number.

It is an amenable number.

870672782711581 is a deficient number, since it is larger than the sum of its proper divisors (1).

870672782711581 is an equidigital number, since it uses as much as digits as its factorization.

870672782711581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147517440, while the sum is 70.

The spelling of 870672782711581 in words is "eight hundred seventy trillion, six hundred seventy-two billion, seven hundred eighty-two million, seven hundred eleven thousand, five hundred eighty-one".