161138413974 has 16 divisors (see below), whose sum is σ = 332672855040. Its totient is φ = 51980133480.

The previous prime is 161138413921. The next prime is 161138413991. The reversal of 161138413974 is 479314831161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433167594 + ... + 433167965.

It is an arithmetic number, because the mean of its divisors is an integer number (20792053440).

Almost surely, 2^161138413974 is an apocalyptic number.

161138413974 is an abundant number, since it is smaller than the sum of its proper divisors (171534441066).

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

161138413974 is a wasteful number, since it uses less digits than its factorization.

161138413974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866335595.

The product of its digits is 435456, while the sum is 48.

The spelling of 161138413974 in words is "one hundred sixty-one billion, one hundred thirty-eight million, four hundred thirteen thousand, nine hundred seventy-four".