18465548544 has 243 divisors, whose sum is σ = 56570001033. Its totient is φ = 5792090112.

The previous prime is 18465548539. The next prime is 18465548561. The reversal of 18465548544 is 44584556481.

The square root of 18465548544 is 135888.

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

18465548544 is a `hidden beast` number, since 1 + 8 + 4 + 6 + 55 + 48 + 544 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2163366144 + 16302182400 = 46512^2 + 127680^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 123929782 + ... + 123929930.

Almost surely, 2^18465548544 is an apocalyptic number.

18465548544 is the 135888-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18465548544

18465548544 is an abundant number, since it is smaller than the sum of its proper divisors (38104452489).

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

18465548544 is an equidigital number, since it uses as much as digits as its factorization.

18465548544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 173 counting only the distinct ones).

The product of its digits is 12288000, while the sum is 54.

It can be divided in two parts, 18465 and 548544, that added together give a square (567009 = 753²).

The spelling of 18465548544 in words is "eighteen billion, four hundred sixty-five million, five hundred forty-eight thousand, five hundred forty-four".