72220317081793 has 2 divisors, whose sum is σ = 72220317081794. Its totient is φ = 72220317081792.

The previous prime is 72220317081733. The next prime is 72220317081943. The reversal of 72220317081793 is 39718071302227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38451991735089 + 33768325346704 = 6200967^2 + 5811052^2 .

It is a cyclic number.

It is not a de Polignac number, because 72220317081793 - 2³³ = 72211727147201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72220317081793.

It is not a weakly prime, because it can be changed into another prime (72220317081713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36110158540896 + 36110158540897.

It is an arithmetic number, because the mean of its divisors is an integer number (36110158540897).

Almost surely, 2^{72220317081793} is an apocalyptic number.

It is an amenable number.

72220317081793 is a deficient number, since it is larger than the sum of its proper divisors (1).

72220317081793 is an equidigital number, since it uses as much as digits as its factorization.

72220317081793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 72220317081793 in words is "seventy-two trillion, two hundred twenty billion, three hundred seventeen million, eighty-one thousand, seven hundred ninety-three".