161265164 has 12 divisors (see below), whose sum is σ = 282694104. Its totient is φ = 80495424.

The previous prime is 161265161. The next prime is 161265197. The reversal of 161265164 is 461562161.

It is a self number, because there is not a number n which added to its sum of digits gives 161265164.

It is not an unprimeable number, because it can be changed into a prime (161265161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31622 + ... + 36365.

It is an arithmetic number, because the mean of its divisors is an integer number (23557842).

Almost surely, 2^161265164 is an apocalyptic number.

It is an amenable number.

161265164 is a deficient number, since it is larger than the sum of its proper divisors (121428940).

161265164 is a wasteful number, since it uses less digits than its factorization.

161265164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68584 (or 68582 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 161265164 is about 12699.0221670804. The cubic root of 161265164 is about 544.3106780385.

The spelling of 161265164 in words is "one hundred sixty-one million, two hundred sixty-five thousand, one hundred sixty-four".