72220720520451 has 32 divisors (see below), whose sum is σ = 100964771228160. Its totient is φ = 45858572411904.

The previous prime is 72220720520369. The next prime is 72220720520519. The reversal of 72220720520451 is 15402502702227.

It is not a de Polignac number, because 72220720520451 - 2¹⁴ = 72220720504067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72220720527451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2570791 + ... + 12290256.

It is an arithmetic number, because the mean of its divisors is an integer number (3155149100880).

Almost surely, 2^{72220720520451} is an apocalyptic number.

72220720520451 is a deficient number, since it is larger than the sum of its proper divisors (28744050707709).

72220720520451 is a wasteful number, since it uses less digits than its factorization.

72220720520451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14861835.

The product of its (nonzero) digits is 156800, while the sum is 39.

The spelling of 72220720520451 in words is "seventy-two trillion, two hundred twenty billion, seven hundred twenty million, five hundred twenty thousand, four hundred fifty-one".