191951249650 has 96 divisors (see below), whose sum is σ = 386723462400. Its totient is φ = 70648200000.

The previous prime is 191951249641. The next prime is 191951249687. The reversal of 191951249650 is 56942159191.

191951249650 is digitally balanced in base 2, 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 (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7299025 + ... + 7325275.

It is an arithmetic number, because the mean of its divisors is an integer number (4028369400).

Almost surely, 2^191951249650 is an apocalyptic number.

191951249650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191951249650 is an abundant number, since it is smaller than the sum of its proper divisors (194772212750).

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

191951249650 is a wasteful number, since it uses less digits than its factorization.

191951249650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26504 (or 26499 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 52.

The spelling of 191951249650 in words is "one hundred ninety-one billion, nine hundred fifty-one million, two hundred forty-nine thousand, six hundred fifty".