161650190 has 24 divisors (see below), whose sum is σ = 315077688. Its totient is φ = 59685600.

The previous prime is 161650171. The next prime is 161650207. The reversal of 161650190 is 91056161.

It is a super-2 number, since 2×161650190² = 52261567854072200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46136 + ... + 49515.

It is an arithmetic number, because the mean of its divisors is an integer number (13128237).

Almost surely, 2^161650190 is an apocalyptic number.

161650190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161650190 is a deficient number, since it is larger than the sum of its proper divisors (153427498).

161650190 is a wasteful number, since it uses less digits than its factorization.

161650190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95684 (or 95671 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 161650190 is about 12714.1728004617. The cubic root of 161650190 is about 544.7435204261.

The spelling of 161650190 in words is "one hundred sixty-one million, six hundred fifty thousand, one hundred ninety".