161253594 has 24 divisors (see below), whose sum is σ = 349937172. Its totient is φ = 53665920.

The previous prime is 161253593. The next prime is 161253629. The reversal of 161253594 is 495352161.

161253594 is a `hidden beast` number, since 1 + 6 + 12 + 53 + 594 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 146531025 + 14722569 = 12105^2 + 3837^2 .

It is not an unprimeable number, because it can be changed into a prime (161253593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5122 + ... + 18674.

Almost surely, 2^161253594 is an apocalyptic number.

161253594 is an abundant number, since it is smaller than the sum of its proper divisors (188683578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161253594 is a wasteful number, since it uses less digits than its factorization.

161253594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14222 (or 14219 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 161253594 is about 12698.5666120236. The cubic root of 161253594 is about 544.2976605026.

The spelling of 161253594 in words is "one hundred sixty-one million, two hundred fifty-three thousand, five hundred ninety-four".