191825964 has 72 divisors (see below), whose sum is σ = 534223872. Its totient is φ = 57552480.

The previous prime is 191825947. The next prime is 191825971. The reversal of 191825964 is 469528191.

191825964 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 38437 + ... + 43139.

It is an arithmetic number, because the mean of its divisors is an integer number (7419776).

Almost surely, 2^191825964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191825964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267111936).

191825964 is an abundant number, since it is smaller than the sum of its proper divisors (342397908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191825964 is a wasteful number, since it uses less digits than its factorization.

191825964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4827 (or 4822 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 191825964 is about 13850.1250535871. The cubic root of 191825964 is about 576.7254675507.

The spelling of 191825964 in words is "one hundred ninety-one million, eight hundred twenty-five thousand, nine hundred sixty-four".