161086365 has 48 divisors (see below), whose sum is σ = 317865600. Its totient is φ = 74701440.

The previous prime is 161086349. The next prime is 161086369. The reversal of 161086365 is 563680161.

It is a happy number.

161086365 is a `hidden beast` number, since 1 + 6 + 10 + 8 + 636 + 5 = 666.

It is not a de Polignac number, because 161086365 - 2⁴ = 161086349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161086369) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4311 + ... + 18459.

It is an arithmetic number, because the mean of its divisors is an integer number (6622200).

Almost surely, 2^161086365 is an apocalyptic number.

161086365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161086365 is a deficient number, since it is larger than the sum of its proper divisors (156779235).

161086365 is a wasteful number, since it uses less digits than its factorization.

161086365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14194 (or 14191 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 161086365 is about 12691.9803419325. The cubic root of 161086365 is about 544.1094397124.

The spelling of 161086365 in words is "one hundred sixty-one million, eighty-six thousand, three hundred sixty-five".