161065900 has 18 divisors (see below), whose sum is σ = 349513220. Its totient is φ = 64426320.

The previous prime is 161065897. The next prime is 161065901. The reversal of 161065900 is 9560161.

It is not an unprimeable number, because it can be changed into a prime (161065901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 805230 + ... + 805429.

Almost surely, 2^161065900 is an apocalyptic number.

161065900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161065900 is an abundant number, since it is smaller than the sum of its proper divisors (188447320).

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

161065900 is a wasteful number, since it uses less digits than its factorization.

161065900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610673 (or 1610666 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 161065900 is about 12691.1740985616. The cubic root of 161065900 is about 544.0863968532.

The spelling of 161065900 in words is "one hundred sixty-one million, sixty-five thousand, nine hundred".