161933478 has 32 divisors (see below), whose sum is σ = 386228736. Its totient is φ = 44254848.

The previous prime is 161933461. The next prime is 161933507. The reversal of 161933478 is 874339161.

161933478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82851 + ... + 84782.

It is an arithmetic number, because the mean of its divisors is an integer number (12069648).

Almost surely, 2^161933478 is an apocalyptic number.

161933478 is an abundant number, since it is smaller than the sum of its proper divisors (224295258).

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

161933478 is a wasteful number, since it uses less digits than its factorization.

161933478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167668.

The product of its digits is 108864, while the sum is 42.

The square root of 161933478 is about 12725.3085620742. The cubic root of 161933478 is about 545.0615512785.

The spelling of 161933478 in words is "one hundred sixty-one million, nine hundred thirty-three thousand, four hundred seventy-eight".