18255252544 has 21 divisors (see below), whose sum is σ = 36227411797. Its totient is φ = 9127085824.

The previous prime is 18255252487. The next prime is 18255252581. The reversal of 18255252544 is 44525255281.

The square root of 18255252544 is 135112.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 619412544 + 17635840000 = 24888^2 + 132800^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18255252544.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1072452 + ... + 1089340.

Almost surely, 2^18255252544 is an apocalyptic number.

18255252544 is the 135112-nd square number.

It is an amenable number.

18255252544 is a deficient number, since it is larger than the sum of its proper divisors (17972159253).

18255252544 is an frugal number, since it uses more digits than its factorization.

18255252544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33790 (or 16891 counting only the distinct ones).

The product of its digits is 640000, while the sum is 43.

The spelling of 18255252544 in words is "eighteen billion, two hundred fifty-five million, two hundred fifty-two thousand, five hundred forty-four".