191312495446 has 8 divisors (see below), whose sum is σ = 286971850440. Its totient is φ = 95655211968.

The previous prime is 191312495411. The next prime is 191312495447. The reversal of 191312495446 is 644594213191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 191312495446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191312495447) 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 3 ways as a sum of consecutive naturals, for example, 261636 + ... + 671623.

It is an arithmetic number, because the mean of its divisors is an integer number (35871481305).

Almost surely, 2^191312495446 is an apocalyptic number.

191312495446 is a deficient number, since it is larger than the sum of its proper divisors (95659354994).

191312495446 is a wasteful number, since it uses less digits than its factorization.

191312495446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035758.

The product of its digits is 933120, while the sum is 49.

The spelling of 191312495446 in words is "one hundred ninety-one billion, three hundred twelve million, four hundred ninety-five thousand, four hundred forty-six".