191145536 has 56 divisors (see below), whose sum is σ = 388400544. Its totient is φ = 93312000.

The previous prime is 191145527. The next prime is 191145553. The reversal of 191145536 is 635541191.

191145536 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 191145496 and 191145505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761411 + ... + 761661.

It is an arithmetic number, because the mean of its divisors is an integer number (6935724).

Almost surely, 2^191145536 is an apocalyptic number.

191145536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191145536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194200272).

191145536 is an abundant number, since it is smaller than the sum of its proper divisors (197255008).

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

191145536 is a wasteful number, since it uses less digits than its factorization.

191145536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 489 counting only the distinct ones).

The product of its digits is 16200, while the sum is 35.

The square root of 191145536 is about 13825.5392661552. The cubic root of 191145536 is about 576.0427565998.

The spelling of 191145536 in words is "one hundred ninety-one million, one hundred forty-five thousand, five hundred thirty-six".