6439735677 has 16 divisors (see below), whose sum is σ = 9095179392. Its totient is φ = 4038935040.

The previous prime is 6439735667. The next prime is 6439735699. The reversal of 6439735677 is 7765379346.

It is not a de Polignac number, because 6439735677 - 2¹⁶ = 6439670141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439735667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103528 + ... + 153614.

It is an arithmetic number, because the mean of its divisors is an integer number (568448712).

Almost surely, 2^6439735677 is an apocalyptic number.

It is an amenable number.

6439735677 is a deficient number, since it is larger than the sum of its proper divisors (2655443715).

6439735677 is a wasteful number, since it uses less digits than its factorization.

6439735677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52628.

The product of its digits is 20003760, while the sum is 57.

The square root of 6439735677 is about 80247.9636937910. The cubic root of 6439735677 is about 1860.4700393174.

The spelling of 6439735677 in words is "six billion, four hundred thirty-nine million, seven hundred thirty-five thousand, six hundred seventy-seven".