18256139522064 has 200 divisors, whose sum is σ = 54280878722048. Its totient is φ = 5919355895040.

The previous prime is 18256139522029. The next prime is 18256139522087. The reversal of 18256139522064 is 46022593165281.

18256139522064 is a `hidden beast` number, since 1 + 8 + 2 + 56 + 1 + 3 + 9 + 522 + 0 + 64 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18256139522064.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 190177599 + ... + 190273569.

Almost surely, 2^{18256139522064} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18256139522064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27140439361024).

18256139522064 is an abundant number, since it is smaller than the sum of its proper divisors (36024739199984).

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

18256139522064 is a wasteful number, since it uses less digits than its factorization.

18256139522064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99995 (or 99980 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 18256139522064 in words is "eighteen trillion, two hundred fifty-six billion, one hundred thirty-nine million, five hundred twenty-two thousand, sixty-four".