82139967648 has 96 divisors (see below), whose sum is σ = 252184161600. Its totient is φ = 25938931968.

The previous prime is 82139967631. The next prime is 82139967653. The reversal of 82139967648 is 84676993128.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2485411 + ... + 2518242.

It is an arithmetic number, because the mean of its divisors is an integer number (2626918350).

Almost surely, 2^82139967648 is an apocalyptic number.

It is an amenable number.

82139967648 is an abundant number, since it is smaller than the sum of its proper divisors (170044193952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82139967648 is a wasteful number, since it uses less digits than its factorization.

82139967648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003691 (or 5003677 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 82139967648 in words is "eighty-two billion, one hundred thirty-nine million, nine hundred sixty-seven thousand, six hundred forty-eight".