191249500492 has 12 divisors (see below), whose sum is σ = 334691274456. Its totient is φ = 95623422080.

The previous prime is 191249500471. The next prime is 191249500499. The reversal of 191249500492 is 294005942191.

It is a happy number.

191249500492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (191249500499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37692 + ... + 619612.

It is an arithmetic number, because the mean of its divisors is an integer number (27890939538).

Almost surely, 2^191249500492 is an apocalyptic number.

It is an amenable number.

191249500492 is a deficient number, since it is larger than the sum of its proper divisors (143441773964).

191249500492 is a wasteful number, since it uses less digits than its factorization.

191249500492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664088 (or 664086 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 191249500492 in words is "one hundred ninety-one billion, two hundred forty-nine million, five hundred thousand, four hundred ninety-two".