18642438288564 has 48 divisors (see below), whose sum is σ = 45789203604480. Its totient is φ = 5886988230240.

The previous prime is 18642438288559. The next prime is 18642438288587. The reversal of 18642438288564 is 46588283424681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13789167 + ... + 15080649.

It is an arithmetic number, because the mean of its divisors is an integer number (953941741760).

Almost surely, 2^{18642438288564} is an apocalyptic number.

It is an amenable number.

18642438288564 is an abundant number, since it is smaller than the sum of its proper divisors (27146765315916).

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

18642438288564 is a wasteful number, since it uses less digits than its factorization.

18642438288564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354820 (or 1354818 counting only the distinct ones).

The product of its digits is 566231040, while the sum is 69.

The spelling of 18642438288564 in words is "eighteen trillion, six hundred forty-two billion, four hundred thirty-eight million, two hundred eighty-eight thousand, five hundred sixty-four".