161163977 has 12 divisors (see below), whose sum is σ = 174887244. Its totient is φ = 148449600.

The previous prime is 161163949. The next prime is 161163979. The reversal of 161163977 is 779361161.

It is a happy number.

161163977 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 6 ways, for example, as 29855296 + 131308681 = 5464^2 + 11459^2 .

It is not a de Polignac number, because 161163977 - 2²⁴ = 144386761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161163979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123227 + ... + 124527.

It is an arithmetic number, because the mean of its divisors is an integer number (14573937).

Almost surely, 2^161163977 is an apocalyptic number.

It is an amenable number.

161163977 is a deficient number, since it is larger than the sum of its proper divisors (13723267).

161163977 is a wasteful number, since it uses less digits than its factorization.

161163977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060 (or 2047 counting only the distinct ones).

The product of its digits is 47628, while the sum is 41.

The square root of 161163977 is about 12695.0374950214. The cubic root of 161163977 is about 544.1968103216.

The spelling of 161163977 in words is "one hundred sixty-one million, one hundred sixty-three thousand, nine hundred seventy-seven".