165080157938 has 4 divisors (see below), whose sum is σ = 247620236910. Its totient is φ = 82540078968.

The previous prime is 165080157919. The next prime is 165080157943. The reversal of 165080157938 is 839751080561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 161815521169 + 3264636769 = 402263^2 + 57137^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 165080157938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41270039483 + ... + 41270039486.

Almost surely, 2^165080157938 is an apocalyptic number.

165080157938 is a deficient number, since it is larger than the sum of its proper divisors (82540078972).

165080157938 is an equidigital number, since it uses as much as digits as its factorization.

165080157938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82540078971.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 165080157938 in words is "one hundred sixty-five billion, eighty million, one hundred fifty-seven thousand, nine hundred thirty-eight".