181983294025 has 27 divisors (see below), whose sum is σ = 244390190709. Its totient is φ = 134367186720.

The previous prime is 181983294019. The next prime is 181983294131. The reversal of 181983294025 is 520492389181.

The square root of 181983294025 is 426595.

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 46906463241 + 135076830784 = 216579^2 + 367528^2 .

It is not a de Polignac number, because 181983294025 - 2¹¹ = 181983291977 is a prime.

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, 27725394 + ... + 27731956.

Almost surely, 2^181983294025 is an apocalyptic number.

181983294025 is the 426595-th square number.

181983294025 is the 213298-th centered octagonal number.

It is an amenable number.

181983294025 is a deficient number, since it is larger than the sum of its proper divisors (62406896684).

181983294025 is an frugal number, since it uses more digits than its factorization.

181983294025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13162 (or 6581 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 181983294025 in words is "one hundred eighty-one billion, nine hundred eighty-three million, two hundred ninety-four thousand, twenty-five".