18668577396336 has 40 divisors (see below), whose sum is σ = 55116752313984. Its totient is φ = 5333879256000.

The previous prime is 18668577396317. The next prime is 18668577396397. The reversal of 18668577396336 is 63369377586681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27780620790 + ... + 27780621461.

Almost surely, 2^{18668577396336} is an apocalyptic number.

18668577396336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18668577396336 is an abundant number, since it is smaller than the sum of its proper divisors (36448174917648).

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

18668577396336 is a wasteful number, since it uses less digits than its factorization.

18668577396336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55561242269 (or 55561242263 counting only the distinct ones).

The product of its digits is 4938071040, while the sum is 78.

The spelling of 18668577396336 in words is "eighteen trillion, six hundred sixty-eight billion, five hundred seventy-seven million, three hundred ninety-six thousand, three hundred thirty-six".