391344264879 has 8 divisors (see below), whose sum is σ = 526409985072. Its totient is φ = 258587360640.

The previous prime is 391344264827. The next prime is 391344264881. The reversal of 391344264879 is 978462443193.

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

It is not a de Polignac number, because 391344264879 - 2¹⁹ = 391343740591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391344264889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 577203592 + ... + 577204269.

It is an arithmetic number, because the mean of its divisors is an integer number (65801248134).

Almost surely, 2^391344264879 is an apocalyptic number.

391344264879 is a deficient number, since it is larger than the sum of its proper divisors (135065720193).

391344264879 is a wasteful number, since it uses less digits than its factorization.

391344264879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154407977.

The product of its digits is 31352832, while the sum is 60.

The spelling of 391344264879 in words is "three hundred ninety-one billion, three hundred forty-four million, two hundred sixty-four thousand, eight hundred seventy-nine".