18944415555556 has 12 divisors (see below), whose sum is σ = 34897607602480. Its totient is φ = 8973670526280.

The previous prime is 18944415555517. The next prime is 18944415555599. The reversal of 18944415555556 is 65555551444981.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18944415555491 and 18944415555500.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124634312790 + ... + 124634312941.

Almost surely, 2^{18944415555556} is an apocalyptic number.

It is an amenable number.

18944415555556 is a deficient number, since it is larger than the sum of its proper divisors (15953192046924).

18944415555556 is a wasteful number, since it uses less digits than its factorization.

18944415555556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249268625754 (or 249268625752 counting only the distinct ones).

The product of its digits is 432000000, while the sum is 67.

The spelling of 18944415555556 in words is "eighteen trillion, nine hundred forty-four billion, four hundred fifteen million, five hundred fifty-five thousand, five hundred fifty-six".