161468145 has 12 divisors (see below), whose sum is σ = 279878196. Its totient is φ = 86116320.

The previous prime is 161468141. The next prime is 161468147. The reversal of 161468145 is 541864161.

It can be written as a sum of positive squares in 2 ways, for example, as 77580864 + 83887281 = 8808^2 + 9159^2 .

It is not a de Polignac number, because 161468145 - 2² = 161468141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161468141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1794046 + ... + 1794135.

It is an arithmetic number, because the mean of its divisors is an integer number (23323183).

Almost surely, 2^161468145 is an apocalyptic number.

161468145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161468145 is a deficient number, since it is larger than the sum of its proper divisors (118410051).

161468145 is a wasteful number, since it uses less digits than its factorization.

161468145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588192 (or 3588189 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 161468145 is about 12707.0116471183. The cubic root of 161468145 is about 544.5389530122.

The spelling of 161468145 in words is "one hundred sixty-one million, four hundred sixty-eight thousand, one hundred forty-five".