72320670877 has 16 divisors (see below), whose sum is σ = 91881352192. Its totient is φ = 55374917760.

The previous prime is 72320670859. The next prime is 72320670883. The reversal of 72320670877 is 77807602327.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72320670877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72320670877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72320670847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12815448 + ... + 12821089.

It is an arithmetic number, because the mean of its divisors is an integer number (5742584512).

Almost surely, 2^72320670877 is an apocalyptic number.

It is an amenable number.

72320670877 is a deficient number, since it is larger than the sum of its proper divisors (19560681315).

72320670877 is a wasteful number, since it uses less digits than its factorization.

72320670877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25636588.

The product of its (nonzero) digits is 1382976, while the sum is 49.

The spelling of 72320670877 in words is "seventy-two billion, three hundred twenty million, six hundred seventy thousand, eight hundred seventy-seven".