72645617664366 has 16 divisors (see below), whose sum is σ = 151608245560704. Its totient is φ = 23162370849464.

The previous prime is 72645617664247. The next prime is 72645617664401. The reversal of 72645617664366 is 66346671654627.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a self number, because there is not a number n which added to its sum of digits gives 72645617664366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263208759516 + ... + 263208759791.

It is an arithmetic number, because the mean of its divisors is an integer number (9475515347544).

Almost surely, 2^{72645617664366} is an apocalyptic number.

72645617664366 is an abundant number, since it is smaller than the sum of its proper divisors (78962627896338).

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

72645617664366 is a wasteful number, since it uses less digits than its factorization.

72645617664366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526417519335.

The product of its digits is 1097349120, while the sum is 69.

The spelling of 72645617664366 in words is "seventy-two trillion, six hundred forty-five billion, six hundred seventeen million, six hundred sixty-four thousand, three hundred sixty-six".