72820318775039 has 16 divisors (see below), whose sum is σ = 83622725738880. Its totient is φ = 62715083729760.

The previous prime is 72820318775023. The next prime is 72820318775053. The reversal of 72820318775039 is 93057781302827.

It is not a de Polignac number, because 72820318775039 - 2⁴ = 72820318775023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72820318705039) 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, 10841477 + ... + 16222769.

It is an arithmetic number, because the mean of its divisors is an integer number (5226420358680).

Almost surely, 2^{72820318775039} is an apocalyptic number.

72820318775039 is a deficient number, since it is larger than the sum of its proper divisors (10802406963841).

72820318775039 is a wasteful number, since it uses less digits than its factorization.

72820318775039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5446070.

The product of its (nonzero) digits is 35562240, while the sum is 62.

The spelling of 72820318775039 in words is "seventy-two trillion, eight hundred twenty billion, three hundred eighteen million, seven hundred seventy-five thousand, thirty-nine".