72220720520591 has 2 divisors, whose sum is σ = 72220720520592. Its totient is φ = 72220720520590.

The previous prime is 72220720520573. The next prime is 72220720520603. The reversal of 72220720520591 is 19502502702227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72220720520591 - 2⁶ = 72220720520527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72220720520891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36110360260295 + 36110360260296.

It is an arithmetic number, because the mean of its divisors is an integer number (36110360260296).

Almost surely, 2^{72220720520591} is an apocalyptic number.

72220720520591 is a deficient number, since it is larger than the sum of its proper divisors (1).

72220720520591 is an equidigital number, since it uses as much as digits as its factorization.

72220720520591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 72220720520591 in words is "seventy-two trillion, two hundred twenty billion, seven hundred twenty million, five hundred twenty thousand, five hundred ninety-one".