82645964673 has 4 divisors (see below), whose sum is σ = 110194619568. Its totient is φ = 55097309780.

The previous prime is 82645964669. The next prime is 82645964693. The reversal of 82645964673 is 37646954628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82645964673 - 2² = 82645964669 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82645964693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13774327443 + ... + 13774327448.

It is an arithmetic number, because the mean of its divisors is an integer number (27548654892).

Almost surely, 2^82645964673 is an apocalyptic number.

It is an amenable number.

82645964673 is a deficient number, since it is larger than the sum of its proper divisors (27548654895).

82645964673 is a wasteful number, since it uses less digits than its factorization.

82645964673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27548654894.

The product of its digits is 52254720, while the sum is 60.

The spelling of 82645964673 in words is "eighty-two billion, six hundred forty-five million, nine hundred sixty-four thousand, six hundred seventy-three".