161506107 has 18 divisors (see below), whose sum is σ = 271374948. Its totient is φ = 92288952.

The previous prime is 161506097. The next prime is 161506109. The reversal of 161506107 is 701605161.

It is not a de Polignac number, because 161506107 - 2⁴ = 161506091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161506109) 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 17 ways as a sum of consecutive naturals, for example, 182673 + ... + 183554.

It is an arithmetic number, because the mean of its divisors is an integer number (15076386).

Almost surely, 2^161506107 is an apocalyptic number.

161506107 is a deficient number, since it is larger than the sum of its proper divisors (109868841).

161506107 is a wasteful number, since it uses less digits than its factorization.

161506107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366247 (or 366237 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 161506107 is about 12708.5053015687. The cubic root of 161506107 is about 544.5816243142.

The spelling of 161506107 in words is "one hundred sixty-one million, five hundred six thousand, one hundred seven".