72396571493 has 2 divisors, whose sum is σ = 72396571494. Its totient is φ = 72396571492.

The previous prime is 72396571487. The next prime is 72396571519. The reversal of 72396571493 is 39417569327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49553876449 + 22842695044 = 222607^2 + 151138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72396571493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72396571453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36198285746 + 36198285747.

It is an arithmetic number, because the mean of its divisors is an integer number (36198285747).

Almost surely, 2^72396571493 is an apocalyptic number.

It is an amenable number.

72396571493 is a deficient number, since it is larger than the sum of its proper divisors (1).

72396571493 is an equidigital number, since it uses as much as digits as its factorization.

72396571493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 56.

The spelling of 72396571493 in words is "seventy-two billion, three hundred ninety-six million, five hundred seventy-one thousand, four hundred ninety-three".