161365523276 has 24 divisors (see below), whose sum is σ = 283719483264. Its totient is φ = 80302976640.

The previous prime is 161365523269. The next prime is 161365523287. The reversal of 161365523276 is 672325563161.

161365523276 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161365523276.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4543106 + ... + 4578486.

It is an arithmetic number, because the mean of its divisors is an integer number (11821645136).

Almost surely, 2^161365523276 is an apocalyptic number.

It is an amenable number.

161365523276 is a deficient number, since it is larger than the sum of its proper divisors (122353959988).

161365523276 is a wasteful number, since it uses less digits than its factorization.

161365523276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40721 (or 40719 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 47.

The spelling of 161365523276 in words is "one hundred sixty-one billion, three hundred sixty-five million, five hundred twenty-three thousand, two hundred seventy-six".