161550015065 has 8 divisors (see below), whose sum is σ = 196515635208. Its totient is φ = 127469600640.

The previous prime is 161550015047. The next prime is 161550015073. The reversal of 161550015065 is 560510055161.

It can be written as a sum of positive squares in 4 ways, for example, as 4501873216 + 157048141849 = 67096^2 + 396293^2 .

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

It is not a de Polignac number, because 161550015065 - 2⁶ = 161550015001 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, 221301026 + ... + 221301755.

It is an arithmetic number, because the mean of its divisors is an integer number (24564454401).

Almost surely, 2^161550015065 is an apocalyptic number.

It is an amenable number.

161550015065 is a deficient number, since it is larger than the sum of its proper divisors (34965620143).

161550015065 is an equidigital number, since it uses as much as digits as its factorization.

161550015065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442602859.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 161550015065 in words is "one hundred sixty-one billion, five hundred fifty million, fifteen thousand, sixty-five".