161327774 has 4 divisors (see below), whose sum is σ = 241991664. Its totient is φ = 80663886.

The previous prime is 161327731. The next prime is 161327797. The reversal of 161327774 is 477723161.

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, 40331942 + ... + 40331945.

It is an arithmetic number, because the mean of its divisors is an integer number (60497916).

Almost surely, 2^161327774 is an apocalyptic number.

161327774 is a deficient number, since it is larger than the sum of its proper divisors (80663890).

161327774 is an equidigital number, since it uses as much as digits as its factorization.

161327774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80663889.

The product of its digits is 49392, while the sum is 38.

The square root of 161327774 is about 12701.4870782913. The cubic root of 161327774 is about 544.3811104479.

The spelling of 161327774 in words is "one hundred sixty-one million, three hundred twenty-seven thousand, seven hundred seventy-four".