18316275079537 has 2 divisors, whose sum is σ = 18316275079538. Its totient is φ = 18316275079536.

The previous prime is 18316275079523. The next prime is 18316275079567. The reversal of 18316275079537 is 73597057261381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18312245876961 + 4029202576 = 4279281^2 + 63476^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18316275079537 is a prime.

It is a super-2 number, since 2×18316275079537² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18316275079567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9158137539768 + 9158137539769.

It is an arithmetic number, because the mean of its divisors is an integer number (9158137539769).

Almost surely, 2^{18316275079537} is an apocalyptic number.

It is an amenable number.

18316275079537 is a deficient number, since it is larger than the sum of its proper divisors (1).

18316275079537 is an equidigital number, since it uses as much as digits as its factorization.

18316275079537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66679200, while the sum is 64.

The spelling of 18316275079537 in words is "eighteen trillion, three hundred sixteen billion, two hundred seventy-five million, seventy-nine thousand, five hundred thirty-seven".