161363005 has 12 divisors (see below), whose sum is σ = 197375220. Its totient is φ = 126643712.

The previous prime is 161362987. The next prime is 161363017. The reversal of 161363005 is 500363161.

It can be written as a sum of positive squares in 6 ways, for example, as 22201 + 161340804 = 149^2 + 12702^2 .

It is not a de Polignac number, because 161363005 - 2⁹ = 161362493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8301 + ... + 19789.

It is an arithmetic number, because the mean of its divisors is an integer number (16447935).

Almost surely, 2^161363005 is an apocalyptic number.

It is an amenable number.

161363005 is a deficient number, since it is larger than the sum of its proper divisors (36012215).

161363005 is an equidigital number, since it uses as much as digits as its factorization.

161363005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11600 (or 11547 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 161363005 is about 12702.8738874319. The cubic root of 161363005 is about 544.4207351500.

The spelling of 161363005 in words is "one hundred sixty-one million, three hundred sixty-three thousand, five".