161457307 has 16 divisors (see below), whose sum is σ = 190425600. Its totient is φ = 135289440.

The previous prime is 161457299. The next prime is 161457319. The reversal of 161457307 is 703754161.

It is not a de Polignac number, because 161457307 - 2³ = 161457299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161457397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2707 + ... + 18172.

It is an arithmetic number, because the mean of its divisors is an integer number (11901600).

Almost surely, 2^161457307 is an apocalyptic number.

161457307 is a deficient number, since it is larger than the sum of its proper divisors (28968293).

161457307 is a wasteful number, since it uses less digits than its factorization.

161457307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20946.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 161457307 is about 12706.5851824949. The cubic root of 161457307 is about 544.5267692979.

The spelling of 161457307 in words is "one hundred sixty-one million, four hundred fifty-seven thousand, three hundred seven".