18077662656 has 42 divisors (see below), whose sum is σ = 51816357632. Its totient is φ = 6025887360.

The previous prime is 18077662643. The next prime is 18077662663. The reversal of 18077662656 is 65626677081.

18077662656 is a `hidden beast` number, since 1 + 8 + 0 + 7 + 7 + 6 + 626 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15691840 + ... + 15692991.

Almost surely, 2^18077662656 is an apocalyptic number.

18077662656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18077662656 is an abundant number, since it is smaller than the sum of its proper divisors (33738694976).

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

18077662656 is a wasteful number, since it uses less digits than its factorization.

18077662656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31384849 (or 31384836 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 18077662656 in words is "eighteen billion, seventy-seven million, six hundred sixty-two thousand, six hundred fifty-six".