18535862664 has 64 divisors (see below), whose sum is σ = 56169288000. Its totient is φ = 5616927360.

The previous prime is 18535862647. The next prime is 18535862669. The reversal of 18535862664 is 46626853581.

18535862664 is a `hidden beast` number, since 1 + 8 + 5 + 3 + 5 + 8 + 626 + 6 + 4 = 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 18535862664.

It is not an unprimeable number, because it can be changed into a prime (18535862669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3898269 + ... + 3903020.

It is an arithmetic number, because the mean of its divisors is an integer number (877645125).

Almost surely, 2^18535862664 is an apocalyptic number.

It is an amenable number.

18535862664 is an abundant number, since it is smaller than the sum of its proper divisors (37633425336).

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

18535862664 is a wasteful number, since it uses less digits than its factorization.

18535862664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7801315 (or 7801305 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 18535862664 in words is "eighteen billion, five hundred thirty-five million, eight hundred sixty-two thousand, six hundred sixty-four".