72373856890457 has 2 divisors, whose sum is σ = 72373856890458. Its totient is φ = 72373856890456.

The previous prime is 72373856890453. The next prime is 72373856890469. The reversal of 72373856890457 is 75409865837327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68165680575001 + 4208176315456 = 8256251^2 + 2051384^2 .

It is a cyclic number.

It is not a de Polignac number, because 72373856890457 - 2² = 72373856890453 is a prime.

It is a super-2 number, since 2×72373856890457² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72373856890453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36186928445228 + 36186928445229.

It is an arithmetic number, because the mean of its divisors is an integer number (36186928445229).

Almost surely, 2^{72373856890457} is an apocalyptic number.

It is an amenable number.

72373856890457 is a deficient number, since it is larger than the sum of its proper divisors (1).

72373856890457 is an equidigital number, since it uses as much as digits as its factorization.

72373856890457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2133734400, while the sum is 74.

The spelling of 72373856890457 in words is "seventy-two trillion, three hundred seventy-three billion, eight hundred fifty-six million, eight hundred ninety thousand, four hundred fifty-seven".