18320817640608 has 192 divisors, whose sum is σ = 64283571072000. Its totient is φ = 4959018277632.

The previous prime is 18320817640579. The next prime is 18320817640633. The reversal of 18320817640608 is 80604671802381.

18320817640608 is a `hidden beast` number, since 1 + 8 + 3 + 20 + 8 + 1 + 7 + 6 + 4 + 0 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79601818 + ... + 79831641.

It is an arithmetic number, because the mean of its divisors is an integer number (334810266000).

Almost surely, 2^{18320817640608} is an apocalyptic number.

18320817640608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18320817640608 is an abundant number, since it is smaller than the sum of its proper divisors (45962753431392).

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

18320817640608 is a wasteful number, since it uses less digits than its factorization.

18320817640608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159433504 (or 159433490 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 18320817640608 in words is "eighteen trillion, three hundred twenty billion, eight hundred seventeen million, six hundred forty thousand, six hundred eight".