161568307 has 16 divisors (see below), whose sum is σ = 173954880. Its totient is φ = 149668992.

The previous prime is 161568301. The next prime is 161568359. The reversal of 161568307 is 703865161.

It is a cyclic number.

It is not a de Polignac number, because 161568307 - 2²⁷ = 27350579 is a prime.

It is a super-2 number, since 2×161568307² = 52208635653692498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161568301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317169 + ... + 317677.

It is an arithmetic number, because the mean of its divisors is an integer number (10872180).

Almost surely, 2^161568307 is an apocalyptic number.

161568307 is a deficient number, since it is larger than the sum of its proper divisors (12386573).

161568307 is a wasteful number, since it uses less digits than its factorization.

161568307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 161568307 is about 12710.9522459964. The cubic root of 161568307 is about 544.6515259630.

The spelling of 161568307 in words is "one hundred sixty-one million, five hundred sixty-eight thousand, three hundred seven".