18004751568 has 60 divisors (see below), whose sum is σ = 50470744740. Its totient is φ = 5991763968.

The previous prime is 18004751551. The next prime is 18004751581. The reversal of 18004751568 is 86515740081.

18004751568 is a `hidden beast` number, since 1 + 80 + 0 + 4 + 7 + 5 + 1 + 568 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2626767504 + 15377984064 = 51252^2 + 124008^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13713 + ... + 190256.

It is an arithmetic number, because the mean of its divisors is an integer number (841179079).

Almost surely, 2^18004751568 is an apocalyptic number.

18004751568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18004751568 is an abundant number, since it is smaller than the sum of its proper divisors (32465993172).

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

18004751568 is a wasteful number, since it uses less digits than its factorization.

18004751568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204596 (or 204587 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 18004751568 in words is "eighteen billion, four million, seven hundred fifty-one thousand, five hundred sixty-eight".