188716392225 has 27 divisors (see below), whose sum is σ = 338023698649. Its totient is φ = 100645267200.

The previous prime is 188716392203. The next prime is 188716392269. The reversal of 188716392225 is 522293617881.

The square root of 188716392225 is 434415.

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

188716392225 is a `hidden beast` number, since 18 + 8 + 7 + 16 + 392 + 225 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 29697284241 + 159019107984 = 172329^2 + 398772^2 .

It is not a de Polignac number, because 188716392225 - 2²⁵ = 188682837793 is a prime.

It is a super-2 number, since 2×188716392225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 6501745 + ... + 6530705.

Almost surely, 2^188716392225 is an apocalyptic number.

188716392225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

188716392225 is the 434415-th square number.

188716392225 is the 217208-th centered octagonal number.

It is an amenable number.

188716392225 is a deficient number, since it is larger than the sum of its proper divisors (149307306424).

188716392225 is an frugal number, since it uses more digits than its factorization.

188716392225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57938 (or 28969 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 188716392225 in words is "one hundred eighty-eight billion, seven hundred sixteen million, three hundred ninety-two thousand, two hundred twenty-five".