82568713578891 has 32 divisors (see below), whose sum is σ = 111771643392000. Its totient is φ = 54210756526080.

The previous prime is 82568713578851. The next prime is 82568713578899. The reversal of 82568713578891 is 19887531786528.

It is a happy number.

It is not a de Polignac number, because 82568713578891 - 2³⁸ = 82293835671947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82568713578899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 885893310 + ... + 885986508.

It is an arithmetic number, because the mean of its divisors is an integer number (3492863856000).

Almost surely, 2^{82568713578891} is an apocalyptic number.

82568713578891 is a deficient number, since it is larger than the sum of its proper divisors (29202929813109).

82568713578891 is a wasteful number, since it uses less digits than its factorization.

82568713578891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106459.

The product of its digits is 1625702400, while the sum is 78.

The spelling of 82568713578891 in words is "eighty-two trillion, five hundred sixty-eight billion, seven hundred thirteen million, five hundred seventy-eight thousand, eight hundred ninety-one".