18156355582444 has 12 divisors (see below), whose sum is σ = 31826666718000. Its totient is φ = 9063022234448.

The previous prime is 18156355582439. The next prime is 18156355582583. The reversal of 18156355582444 is 44428555365181.

It is a super-2 number, since 2×18156355582444² (a number of 27 digits) contains 22 as substring.

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, 3788886499 + ... + 3788891290.

It is an arithmetic number, because the mean of its divisors is an integer number (2652222226500).

Almost surely, 2^{18156355582444} is an apocalyptic number.

It is an amenable number.

18156355582444 is a deficient number, since it is larger than the sum of its proper divisors (13670311135556).

18156355582444 is a wasteful number, since it uses less digits than its factorization.

18156355582444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7577778392 (or 7577778390 counting only the distinct ones).

The product of its digits is 92160000, while the sum is 61.

The spelling of 18156355582444 in words is "eighteen trillion, one hundred fifty-six billion, three hundred fifty-five million, five hundred eighty-two thousand, four hundred forty-four".