191230938590 has 32 divisors (see below), whose sum is σ = 352894582656. Its totient is φ = 74570539680.

The previous prime is 191230938589. The next prime is 191230938593. The reversal of 191230938590 is 95839032191.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191230938593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200276 + ... + 650055.

It is an arithmetic number, because the mean of its divisors is an integer number (11027955708).

Almost surely, 2^191230938590 is an apocalyptic number.

191230938590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191230938590 is a deficient number, since it is larger than the sum of its proper divisors (161663644066).

191230938590 is a wasteful number, since it uses less digits than its factorization.

191230938590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850904.

The product of its (nonzero) digits is 524880, while the sum is 50.

The spelling of 191230938590 in words is "one hundred ninety-one billion, two hundred thirty million, nine hundred thirty-eight thousand, five hundred ninety".