161255156 has 12 divisors (see below), whose sum is σ = 282303840. Its totient is φ = 80596920.

The previous prime is 161255153. The next prime is 161255161. The reversal of 161255156 is 651552161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161255153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7505 + ... + 19463.

It is an arithmetic number, because the mean of its divisors is an integer number (23525320).

Almost surely, 2^161255156 is an apocalyptic number.

It is an amenable number.

161255156 is a deficient number, since it is larger than the sum of its proper divisors (121048684).

161255156 is a wasteful number, since it uses less digits than its factorization.

161255156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15334 (or 15332 counting only the distinct ones).

The product of its digits is 9000, while the sum is 32.

The square root of 161255156 is about 12698.6281148792. The cubic root of 161255156 is about 544.2994179626.

The spelling of 161255156 in words is "one hundred sixty-one million, two hundred fifty-five thousand, one hundred fifty-six".