161422164 has 36 divisors (see below), whose sum is σ = 409150560. Its totient is φ = 53660880.

The previous prime is 161422159. The next prime is 161422169. The reversal of 161422164 is 461224161.

It is an interprime number because it is at equal distance from previous prime (161422159) and next prime (161422169).

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161422169) 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, 7729 + ... + 19559.

Almost surely, 2^161422164 is an apocalyptic number.

It is an amenable number.

161422164 is an abundant number, since it is smaller than the sum of its proper divisors (247728396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161422164 is a wasteful number, since it uses less digits than its factorization.

161422164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12220 (or 12215 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 161422164 is about 12705.2022416017. The cubic root of 161422164 is about 544.4872589712.

The spelling of 161422164 in words is "one hundred sixty-one million, four hundred twenty-two thousand, one hundred sixty-four".