161365523315 has 4 divisors (see below), whose sum is σ = 193638627984. Its totient is φ = 129092418648.

The previous prime is 161365523309. The next prime is 161365523351. The reversal of 161365523315 is 513325563161.

161365523315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161365523315 - 2⁴ = 161365523299 is a prime.

It is a super-2 number, since 2×161365523315² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16136552327 + ... + 16136552336.

It is an arithmetic number, because the mean of its divisors is an integer number (48409656996).

Almost surely, 2^161365523315 is an apocalyptic number.

161365523315 is a deficient number, since it is larger than the sum of its proper divisors (32273104669).

161365523315 is an equidigital number, since it uses as much as digits as its factorization.

161365523315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32273104668.

The product of its digits is 243000, while the sum is 41.

The spelling of 161365523315 in words is "one hundred sixty-one billion, three hundred sixty-five million, five hundred twenty-three thousand, three hundred fifteen".