161349906 has 16 divisors (see below), whose sum is σ = 322999200. Its totient is φ = 53733408.

The previous prime is 161349893. The next prime is 161349913. The reversal of 161349906 is 609943161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5136 + ... + 18683.

It is an arithmetic number, because the mean of its divisors is an integer number (20187450).

Almost surely, 2^161349906 is an apocalyptic number.

161349906 is an abundant number, since it is smaller than the sum of its proper divisors (161649294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161349906 is a wasteful number, since it uses less digits than its factorization.

161349906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24953.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 161349906 is about 12702.3582849800. The cubic root of 161349906 is about 544.4060032309.

The spelling of 161349906 in words is "one hundred sixty-one million, three hundred forty-nine thousand, nine hundred six".