18077979408 has 20 divisors (see below), whose sum is σ = 46701446928. Its totient is φ = 6025993120.

The previous prime is 18077979383. The next prime is 18077979497. The reversal of 18077979408 is 80497977081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188312238 + ... + 188312333.

Almost surely, 2^18077979408 is an apocalyptic number.

It is an amenable number.

18077979408 is an abundant number, since it is smaller than the sum of its proper divisors (28623467520).

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

18077979408 is a wasteful number, since it uses less digits than its factorization.

18077979408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376624582 (or 376624576 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 60.

The spelling of 18077979408 in words is "eighteen billion, seventy-seven million, nine hundred seventy-nine thousand, four hundred eight".