165141761138 has 32 divisors (see below), whose sum is σ = 252529662000. Its totient is φ = 80979388416.

The previous prime is 165141761129. The next prime is 165141761149. The reversal of 165141761138 is 831167141561.

It can be written as a sum of positive squares in 8 ways, for example, as 142780446769 + 22361314369 = 377863^2 + 149537^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19001498 + ... + 19010186.

Almost surely, 2^165141761138 is an apocalyptic number.

165141761138 is a deficient number, since it is larger than the sum of its proper divisors (87387900862).

165141761138 is a wasteful number, since it uses less digits than its factorization.

165141761138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9486.

The product of its digits is 120960, while the sum is 44.

The spelling of 165141761138 in words is "one hundred sixty-five billion, one hundred forty-one million, seven hundred sixty-one thousand, one hundred thirty-eight".