18139364568 has 192 divisors, whose sum is σ = 53857440000. Its totient is φ = 5481665280.

The previous prime is 18139364567. The next prime is 18139364587. The reversal of 18139364568 is 86546393181.

18139364568 is a `hidden beast` number, since 1 + 8 + 13 + 9 + 3 + 64 + 568 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18139364567) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33161271 + ... + 33161817.

It is an arithmetic number, because the mean of its divisors is an integer number (280507500).

Almost surely, 2^18139364568 is an apocalyptic number.

18139364568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18139364568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26928720000).

18139364568 is an abundant number, since it is smaller than the sum of its proper divisors (35718075432).

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

18139364568 is a wasteful number, since it uses less digits than its factorization.

18139364568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1135 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 18139364568 in words is "eighteen billion, one hundred thirty-nine million, three hundred sixty-four thousand, five hundred sixty-eight".