161601950 has 12 divisors (see below), whose sum is σ = 300579720. Its totient is φ = 64640760.

The previous prime is 161601943. The next prime is 161601959. The reversal of 161601950 is 59106161.

It is a super-2 number, since 2×161601950² = 52230380487605000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161601959) 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, 1615970 + ... + 1616069.

It is an arithmetic number, because the mean of its divisors is an integer number (25048310).

Almost surely, 2^161601950 is an apocalyptic number.

161601950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161601950 is a deficient number, since it is larger than the sum of its proper divisors (138977770).

161601950 is a wasteful number, since it uses less digits than its factorization.

161601950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232051 (or 3232046 counting only the distinct ones).

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

The square root of 161601950 is about 12712.2755634072. The cubic root of 161601950 is about 544.6893271876.

The spelling of 161601950 in words is "one hundred sixty-one million, six hundred one thousand, nine hundred fifty".