108439846391 has 6 divisors (see below), whose sum is σ = 112050747576. Its totient is φ = 104941785900.

The previous prime is 108439846387. The next prime is 108439846439. The reversal of 108439846391 is 193648934801.

It is not a de Polignac number, because 108439846391 - 2² = 108439846387 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 (108439846351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56419355 + ... + 56421276.

It is an arithmetic number, because the mean of its divisors is an integer number (18675124596).

Almost surely, 2^108439846391 is an apocalyptic number.

108439846391 is a deficient number, since it is larger than the sum of its proper divisors (3610901185).

108439846391 is an equidigital number, since it uses as much as digits as its factorization.

108439846391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112840693 (or 112840662 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 108439846391 in words is "one hundred eight billion, four hundred thirty-nine million, eight hundred forty-six thousand, three hundred ninety-one".