161918346 has 8 divisors (see below), whose sum is σ = 323836704. Its totient is φ = 53972780.

The previous prime is 161918329. The next prime is 161918347. The reversal of 161918346 is 643819161.

161918346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

161918346 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (161918347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13493190 + ... + 13493201.

It is an arithmetic number, because the mean of its divisors is an integer number (40479588).

Almost surely, 2^161918346 is an apocalyptic number.

161918346 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161918346 is a wasteful number, since it uses less digits than its factorization.

161918346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26986396.

The product of its digits is 31104, while the sum is 39.

The square root of 161918346 is about 12724.7139849979. The cubic root of 161918346 is about 545.0445728492.

The spelling of 161918346 in words is "one hundred sixty-one million, nine hundred eighteen thousand, three hundred forty-six".