181336427325 has 60 divisors (see below), whose sum is σ = 342235643508. Its totient is φ = 94887936000.

The previous prime is 181336427317. The next prime is 181336427423. The reversal of 181336427325 is 523724633181.

181336427325 is a `hidden beast` number, since 1 + 8 + 13 + 364 + 273 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1294056729 + 180042370596 = 35973^2 + 424314^2 .

It is not a de Polignac number, because 181336427325 - 2³ = 181336427317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 737476 + ... + 952125.

Almost surely, 2^181336427325 is an apocalyptic number.

181336427325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

181336427325 is a deficient number, since it is larger than the sum of its proper divisors (160899216183).

181336427325 is a wasteful number, since it uses less digits than its factorization.

181336427325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689676 (or 1689662 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 181336427325 in words is "one hundred eighty-one billion, three hundred thirty-six million, four hundred twenty-seven thousand, three hundred twenty-five".