191353472679 has 4 divisors (see below), whose sum is σ = 255137963576. Its totient is φ = 127568981784.

The previous prime is 191353472671. The next prime is 191353472731. The reversal of 191353472679 is 976274353191.

191353472679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 191353472679 - 2³ = 191353472671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191353472671) 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, 31892245444 + ... + 31892245449.

It is an arithmetic number, because the mean of its divisors is an integer number (63784490894).

Almost surely, 2^191353472679 is an apocalyptic number.

191353472679 is a deficient number, since it is larger than the sum of its proper divisors (63784490897).

191353472679 is an equidigital number, since it uses as much as digits as its factorization.

191353472679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63784490896.

The product of its digits is 8573040, while the sum is 57.

The spelling of 191353472679 in words is "one hundred ninety-one billion, three hundred fifty-three million, four hundred seventy-two thousand, six hundred seventy-nine".