18587645064 has 48 divisors (see below), whose sum is σ = 50347817520. Its totient is φ = 6195108960.

The previous prime is 18587645059. The next prime is 18587645107. The reversal of 18587645064 is 46054678581.

18587645064 is a `hidden beast` number, since 1 + 8 + 587 + 6 + 4 + 50 + 6 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18587645064.

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, 1077999 + ... + 1095105.

It is an arithmetic number, because the mean of its divisors is an integer number (1048912865).

Almost surely, 2^18587645064 is an apocalyptic number.

It is an amenable number.

18587645064 is an abundant number, since it is smaller than the sum of its proper divisors (31760172456).

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

18587645064 is a wasteful number, since it uses less digits than its factorization.

18587645064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32210 (or 32203 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 54.

The spelling of 18587645064 in words is "eighteen billion, five hundred eighty-seven million, six hundred forty-five thousand, sixty-four".