18112605778 has 8 divisors (see below), whose sum is σ = 27496245168. Its totient is φ = 8947190724.

The previous prime is 18112605769. The next prime is 18112605781. The reversal of 18112605778 is 87750621181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54555876 + ... + 54556207.

It is an arithmetic number, because the mean of its divisors is an integer number (3437030646).

Almost surely, 2^18112605778 is an apocalyptic number.

18112605778 is a deficient number, since it is larger than the sum of its proper divisors (9383639390).

18112605778 is a wasteful number, since it uses less digits than its factorization.

18112605778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109112168.

The product of its (nonzero) digits is 188160, while the sum is 46.

The spelling of 18112605778 in words is "eighteen billion, one hundred twelve million, six hundred five thousand, seven hundred seventy-eight".