18772516445788 has 48 divisors (see below), whose sum is σ = 37896443492544. Its totient is φ = 7970392926720.

The previous prime is 18772516445773. The next prime is 18772516445797. The reversal of 18772516445788 is 88754461527781.

It is a self number, because there is not a number n which added to its sum of digits gives 18772516445788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5534595 + ... + 8256922.

It is an arithmetic number, because the mean of its divisors is an integer number (789509239428).

Almost surely, 2^{18772516445788} is an apocalyptic number.

It is an amenable number.

18772516445788 is an abundant number, since it is smaller than the sum of its proper divisors (19123927046756).

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

18772516445788 is a wasteful number, since it uses less digits than its factorization.

18772516445788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13791982 (or 13791980 counting only the distinct ones).

The product of its digits is 842956800, while the sum is 73.

The spelling of 18772516445788 in words is "eighteen trillion, seven hundred seventy-two billion, five hundred sixteen million, four hundred forty-five thousand, seven hundred eighty-eight".