161444265 has 16 divisors (see below), whose sum is σ = 264612096. Its totient is φ = 84003200.

The previous prime is 161444251. The next prime is 161444267. The reversal of 161444265 is 562444161.

It is not a de Polignac number, because 161444265 - 2⁵ = 161444233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161444267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130641 + ... + 131870.

It is an arithmetic number, because the mean of its divisors is an integer number (16538256).

Almost surely, 2^161444265 is an apocalyptic number.

161444265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161444265 is a deficient number, since it is larger than the sum of its proper divisors (103167831).

161444265 is a wasteful number, since it uses less digits than its factorization.

161444265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262560.

The product of its digits is 23040, while the sum is 33.

The square root of 161444265 is about 12706.0719736668. The cubic root of 161444265 is about 544.5121071983.

The spelling of 161444265 in words is "one hundred sixty-one million, four hundred forty-four thousand, two hundred sixty-five".