161081950 has 24 divisors (see below), whose sum is σ = 309946680. Its totient is φ = 62210400.

The previous prime is 161081929. The next prime is 161081959. The reversal of 161081950 is 59180161.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161081959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54096 + ... + 56995.

It is an arithmetic number, because the mean of its divisors is an integer number (12914445).

Almost surely, 2^161081950 is an apocalyptic number.

161081950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161081950 is a deficient number, since it is larger than the sum of its proper divisors (148864730).

161081950 is a wasteful number, since it uses less digits than its factorization.

161081950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111132 (or 111127 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 161081950 is about 12691.8064120124. The cubic root of 161081950 is about 544.1044687451.

The spelling of 161081950 in words is "one hundred sixty-one million, eighty-one thousand, nine hundred fifty".