161291054 has 4 divisors (see below), whose sum is σ = 241936584. Its totient is φ = 80645526.

The previous prime is 161291027. The next prime is 161291063. The reversal of 161291054 is 450192161.

161291054 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40322762 + ... + 40322765.

It is an arithmetic number, because the mean of its divisors is an integer number (60484146).

Almost surely, 2^161291054 is an apocalyptic number.

161291054 is a deficient number, since it is larger than the sum of its proper divisors (80645530).

161291054 is an equidigital number, since it uses as much as digits as its factorization.

161291054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80645529.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 161291054 is about 12700.0414959952. The cubic root of 161291054 is about 544.3398049105.

The spelling of 161291054 in words is "one hundred sixty-one million, two hundred ninety-one thousand, fifty-four".