161159013 has 24 divisors (see below), whose sum is σ = 241364448. Its totient is φ = 103535712.

The previous prime is 161158993. The next prime is 161159021. The reversal of 161159013 is 310951161.

161159013 is a `hidden beast` number, since 1 + 61 + 1 + 590 + 13 = 666.

It is not a de Polignac number, because 161159013 - 2⁵ = 161158981 is a prime.

It is a super-2 number, since 2×161159013² = 51944454942268338, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161159023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33370 + ... + 37892.

It is an arithmetic number, because the mean of its divisors is an integer number (10056852).

Almost surely, 2^161159013 is an apocalyptic number.

It is an amenable number.

161159013 is a deficient number, since it is larger than the sum of its proper divisors (80205435).

161159013 is a wasteful number, since it uses less digits than its factorization.

161159013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4673 (or 4670 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 161159013 is about 12694.8419840501. The cubic root of 161159013 is about 544.1912230087.

The spelling of 161159013 in words is "one hundred sixty-one million, one hundred fifty-nine thousand, thirteen".