18772786127664 has 30 divisors (see below), whose sum is σ = 52537727843796. Its totient is φ = 6257595375840.

The previous prime is 18772786127663. The next prime is 18772786127671. The reversal of 18772786127664 is 46672168727781.

18772786127664 is a `hidden beast` number, since 1 + 87 + 7 + 278 + 6 + 1 + 276 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 18772786127592 and 18772786127601.

It is not an unprimeable number, because it can be changed into a prime (18772786127663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65183285022 + ... + 65183285309.

Almost surely, 2^{18772786127664} is an apocalyptic number.

It is an amenable number.

18772786127664 is an abundant number, since it is smaller than the sum of its proper divisors (33764941716132).

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

18772786127664 is a wasteful number, since it uses less digits than its factorization.

18772786127664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130366570345 (or 130366570336 counting only the distinct ones).

The product of its digits is 531062784, while the sum is 72.

The spelling of 18772786127664 in words is "eighteen trillion, seven hundred seventy-two billion, seven hundred eighty-six million, one hundred twenty-seven thousand, six hundred sixty-four".