161205950 has 12 divisors (see below), whose sum is σ = 299843160. Its totient is φ = 64482360.

The previous prime is 161205881. The next prime is 161206027. The reversal of 161205950 is 59502161.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1612010 + ... + 1612109.

It is an arithmetic number, because the mean of its divisors is an integer number (24986930).

Almost surely, 2^161205950 is an apocalyptic number.

161205950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161205950 is a deficient number, since it is larger than the sum of its proper divisors (138637210).

161205950 is a wasteful number, since it uses less digits than its factorization.

161205950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224131 (or 3224126 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 161205950 is about 12696.6905136732. The cubic root of 161205950 is about 544.2440491453.

The spelling of 161205950 in words is "one hundred sixty-one million, two hundred five thousand, nine hundred fifty".