11998573444 has 81 divisors (see below), whose sum is σ = 25057268229. Its totient is φ = 5021221920.

The previous prime is 11998573439. The next prime is 11998573451. The reversal of 11998573444 is 44437589911.

The square root of 11998573444 is 109538.

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

11998573444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1774936900 + 10223636544 = 42130^2 + 101112^2 .

It is a super-2 number, since 2×11998573444² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 31327677 + ... + 31328059.

Almost surely, 2^11998573444 is an apocalyptic number.

11998573444 is the 109538-th square number.

It is an amenable number.

11998573444 is an abundant number, since it is smaller than the sum of its proper divisors (13058694785).

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

11998573444 is a wasteful number, since it uses less digits than its factorization.

11998573444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 409 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The spelling of 11998573444 in words is "eleven billion, nine hundred ninety-eight million, five hundred seventy-three thousand, four hundred forty-four".