18192656131225 has 9 divisors (see below), whose sum is σ = 22558920047517. Its totient is φ = 14554107843840.

The previous prime is 18192656131217. The next prime is 18192656131271. The reversal of 18192656131225 is 52213165629181.

The square root of 18192656131225 is 4265285.

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 4968989349129 + 13223666782096 = 2229123^2 + 3636436^2 .

It is not a de Polignac number, because 18192656131225 - 2³ = 18192656131217 is a prime.

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, 20899897 + ... + 21752953.

Almost surely, 2^{18192656131225} is an apocalyptic number.

18192656131225 is the 4265285-th square number.

18192656131225 is the 2132643-rd centered octagonal number.

It is an amenable number.

18192656131225 is a deficient number, since it is larger than the sum of its proper divisors (4366263916292).

18192656131225 is an frugal number, since it uses more digits than its factorization.

18192656131225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706124 (or 853062 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 52.

The spelling of 18192656131225 in words is "eighteen trillion, one hundred ninety-two billion, six hundred fifty-six million, one hundred thirty-one thousand, two hundred twenty-five".