161361345 has 32 divisors (see below), whose sum is σ = 264536064. Its totient is φ = 83966400.

The previous prime is 161361341. The next prime is 161361367. The reversal of 161361345 is 543163161.

161361345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161361345 - 2² = 161361341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161361341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108960 + ... + 110430.

It is an arithmetic number, because the mean of its divisors is an integer number (8266752).

Almost surely, 2^161361345 is an apocalyptic number.

161361345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161361345 is a deficient number, since it is larger than the sum of its proper divisors (103174719).

161361345 is a wasteful number, since it uses less digits than its factorization.

161361345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653.

The product of its digits is 6480, while the sum is 30.

The square root of 161361345 is about 12702.8085477189. The cubic root of 161361345 is about 544.4188682588.

The spelling of 161361345 in words is "one hundred sixty-one million, three hundred sixty-one thousand, three hundred forty-five".