164891950 has 24 divisors (see below), whose sum is σ = 310402008. Its totient is φ = 65160480.

The previous prime is 164891939. The next prime is 164891981. The reversal of 164891950 is 59198461.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 164891897 and 164891906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15717 + ... + 24016.

It is an arithmetic number, because the mean of its divisors is an integer number (12933417).

Almost surely, 2^164891950 is an apocalyptic number.

164891950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164891950 is a deficient number, since it is larger than the sum of its proper divisors (145510058).

164891950 is a wasteful number, since it uses less digits than its factorization.

164891950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39828 (or 39823 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 164891950 is about 12841.0260493467. The cubic root of 164891950 is about 548.3609051914.

The spelling of 164891950 in words is "one hundred sixty-four million, eight hundred ninety-one thousand, nine hundred fifty".