161358265 has 8 divisors (see below), whose sum is σ = 193960008. Its totient is φ = 128866560.

The previous prime is 161358257. The next prime is 161358277. The reversal of 161358265 is 562853161.

161358265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 52113961 + 109244304 = 7219^2 + 10452^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161358265 - 2³ = 161358257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24246 + ... + 30175.

It is an arithmetic number, because the mean of its divisors is an integer number (24245001).

Almost surely, 2^161358265 is an apocalyptic number.

It is an amenable number.

161358265 is a deficient number, since it is larger than the sum of its proper divisors (32601743).

161358265 is an equidigital number, since it uses as much as digits as its factorization.

161358265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55019.

The product of its digits is 43200, while the sum is 37.

The square root of 161358265 is about 12702.6873141080. The cubic root of 161358265 is about 544.4154043545.

The spelling of 161358265 in words is "one hundred sixty-one million, three hundred fifty-eight thousand, two hundred sixty-five".