6439179677 has 4 divisors (see below), whose sum is σ = 7359062496. Its totient is φ = 5519296860.

The previous prime is 6439179673. The next prime is 6439179689. The reversal of 6439179677 is 7769719346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6439179677 - 2² = 6439179673 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 (6439179673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459941399 + ... + 459941412.

It is an arithmetic number, because the mean of its divisors is an integer number (1839765624).

Almost surely, 2^6439179677 is an apocalyptic number.

It is an amenable number.

6439179677 is a deficient number, since it is larger than the sum of its proper divisors (919882819).

6439179677 is an equidigital number, since it uses as much as digits as its factorization.

6439179677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919882818.

The product of its digits is 12002256, while the sum is 59.

The square root of 6439179677 is about 80244.4993566537. The cubic root of 6439179677 is about 1860.4164941014.

The spelling of 6439179677 in words is "six billion, four hundred thirty-nine million, one hundred seventy-nine thousand, six hundred seventy-seven".