18311279968799 has 2 divisors, whose sum is σ = 18311279968800. Its totient is φ = 18311279968798.

The previous prime is 18311279968747. The next prime is 18311279968837. The reversal of 18311279968799 is 99786997211381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18311279968799 - 2²⁴ = 18311263191583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18311279968099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9155639984399 + 9155639984400.

It is an arithmetic number, because the mean of its divisors is an integer number (9155639984400).

Almost surely, 2^{18311279968799} is an apocalyptic number.

18311279968799 is a deficient number, since it is larger than the sum of its proper divisors (1).

18311279968799 is an equidigital number, since it uses as much as digits as its factorization.

18311279968799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740710656, while the sum is 80.

The spelling of 18311279968799 in words is "eighteen trillion, three hundred eleven billion, two hundred seventy-nine million, nine hundred sixty-eight thousand, seven hundred ninety-nine".