161137332025 has 12 divisors (see below), whose sum is σ = 206700302700. Its totient is φ = 124464697280.

The previous prime is 161137332017. The next prime is 161137332079. The reversal of 161137332025 is 520233731161.

It can be written as a sum of positive squares in 6 ways, for example, as 2200360464 + 158936971561 = 46908^2 + 398669^2 .

It is not a de Polignac number, because 161137332025 - 2³ = 161137332017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111128470 + ... + 111129919.

It is an arithmetic number, because the mean of its divisors is an integer number (17225025225).

Almost surely, 2^161137332025 is an apocalyptic number.

It is an amenable number.

161137332025 is a deficient number, since it is larger than the sum of its proper divisors (45562970675).

161137332025 is a wasteful number, since it uses less digits than its factorization.

161137332025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222258428 (or 222258423 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The spelling of 161137332025 in words is "one hundred sixty-one billion, one hundred thirty-seven million, three hundred thirty-two thousand, twenty-five".