161911514 has 8 divisors (see below), whose sum is σ = 242921268. Its totient is φ = 80937760.

The previous prime is 161911511. The next prime is 161911531. The reversal of 161911514 is 415119161.

161911514 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 148035889 + 13875625 = 12167^2 + 3725^2 .

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

It is not an unprimeable number, because it can be changed into a prime (161911511) 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, 13094 + ... + 22254.

Almost surely, 2^161911514 is an apocalyptic number.

161911514 is a deficient number, since it is larger than the sum of its proper divisors (81009754).

161911514 is an equidigital number, since it uses as much as digits as its factorization.

161911514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18000.

The product of its digits is 1080, while the sum is 29.

The square root of 161911514 is about 12724.4455281949. The cubic root of 161911514 is about 545.0369068517.

The spelling of 161911514 in words is "one hundred sixty-one million, nine hundred eleven thousand, five hundred fourteen".