72220720520501 has 32 divisors (see below), whose sum is σ = 85044716908800. Its totient is φ = 60051411002880.

The previous prime is 72220720520369. The next prime is 72220720520519. The reversal of 72220720520501 is 10502502702227.

It is a cyclic number.

It is not a de Polignac number, because 72220720520501 - 2¹⁴ = 72220720504117 is a prime.

It is a super-2 number, since 2×72220720520501² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72220720520591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 733684955 + ... + 733783383.

It is an arithmetic number, because the mean of its divisors is an integer number (2657647403400).

Almost surely, 2^{72220720520501} is an apocalyptic number.

It is an amenable number.

72220720520501 is a deficient number, since it is larger than the sum of its proper divisors (12823996388299).

72220720520501 is a wasteful number, since it uses less digits than its factorization.

72220720520501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122109.

The product of its (nonzero) digits is 39200, while the sum is 35.

The spelling of 72220720520501 in words is "seventy-two trillion, two hundred twenty billion, seven hundred twenty million, five hundred twenty thousand, five hundred one".