18065641436568 has 80 divisors (see below), whose sum is σ = 55200571077960. Its totient is φ = 5474436796800.

The previous prime is 18065641436509. The next prime is 18065641436573. The reversal of 18065641436568 is 86563414656081.

It is a happy number.

18065641436568 is a `hidden beast` number, since 1 + 8 + 0 + 6 + 5 + 64 + 1 + 4 + 3 + 6 + 568 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1267223613 + ... + 1267237868.

Almost surely, 2^{18065641436568} is an apocalyptic number.

18065641436568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18065641436568 is an abundant number, since it is smaller than the sum of its proper divisors (37134929641392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18065641436568 is a wasteful number, since it uses less digits than its factorization.

18065641436568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534461510 (or 2534461497 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 63.

The spelling of 18065641436568 in words is "eighteen trillion, sixty-five billion, six hundred forty-one million, four hundred thirty-six thousand, five hundred sixty-eight".