82610566115721 has 24 divisors (see below), whose sum is σ = 131255812374624. Its totient is φ = 46054671001920.

The previous prime is 82610566115719. The next prime is 82610566115797. The reversal of 82610566115721 is 12751166501628.

It is not a de Polignac number, because 82610566115721 - 2¹ = 82610566115719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82610566115621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6853367635 + ... + 6853379688.

It is an arithmetic number, because the mean of its divisors is an integer number (5468992182276).

Almost surely, 2^{82610566115721} is an apocalyptic number.

It is an amenable number.

82610566115721 is a deficient number, since it is larger than the sum of its proper divisors (48645246258903).

82610566115721 is a wasteful number, since it uses less digits than its factorization.

82610566115721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13706747381 (or 13706747374 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 82610566115721 in words is "eighty-two trillion, six hundred ten billion, five hundred sixty-six million, one hundred fifteen thousand, seven hundred twenty-one".