161885950 has 12 divisors (see below), whose sum is σ = 301107960. Its totient is φ = 64754360.

The previous prime is 161885929. The next prime is 161885953. The reversal of 161885950 is 59588161.

It is a junction number, because it is equal to n+sod(n) for n = 161885897 and 161885906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161885953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1618810 + ... + 1618909.

It is an arithmetic number, because the mean of its divisors is an integer number (25092330).

Almost surely, 2^161885950 is an apocalyptic number.

161885950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161885950 is a deficient number, since it is larger than the sum of its proper divisors (139222010).

161885950 is a wasteful number, since it uses less digits than its factorization.

161885950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237731 (or 3237726 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 43.

The square root of 161885950 is about 12723.4409653993. The cubic root of 161885950 is about 545.0082202839.

The spelling of 161885950 in words is "one hundred sixty-one million, eight hundred eighty-five thousand, nine hundred fifty".