18072191299600 has 45 divisors (see below), whose sum is σ = 43418643865527. Its totient is φ = 7228842510720.

The previous prime is 18072191299597. The next prime is 18072191299627. The reversal of 18072191299600 is 699219127081.

The square root of 18072191299600 is 4251140.

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

It can be written as a sum of positive squares in 4 ways, for example, as 6058037070864 + 12014154228736 = 2461308^2 + 3466144^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 84916522 + ... + 85129078.

Almost surely, 2^{18072191299600} is an apocalyptic number.

18072191299600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18072191299600 is the 4251140-th square number.

It is an amenable number.

18072191299600 is an abundant number, since it is smaller than the sum of its proper divisors (25346452565927).

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

18072191299600 is an frugal number, since it uses more digits than its factorization.

18072191299600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425132 (or 212564 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 55.

The spelling of 18072191299600 in words is "eighteen trillion, seventy-two billion, one hundred ninety-one million, two hundred ninety-nine thousand, six hundred".