191231994796 has 12 divisors (see below), whose sum is σ = 334665274048. Its totient is φ = 95613345072.

The previous prime is 191231994781. The next prime is 191231994803. The reversal of 191231994796 is 697499132191.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 496191 + ... + 792886.

Almost surely, 2^191231994796 is an apocalyptic number.

It is an amenable number.

191231994796 is a deficient number, since it is larger than the sum of its proper divisors (143433279252).

191231994796 is a wasteful number, since it uses less digits than its factorization.

191231994796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326168 (or 1326166 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 61.

The spelling of 191231994796 in words is "one hundred ninety-one billion, two hundred thirty-one million, nine hundred ninety-four thousand, seven hundred ninety-six".