6371639685 has 16 divisors (see below), whose sum is σ = 11327359680. Its totient is φ = 3398207760.

The previous prime is 6371639623. The next prime is 6371639689. The reversal of 6371639685 is 5869361736.

It is not a de Polignac number, because 6371639685 - 2⁶ = 6371639621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6371639689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23598531 + ... + 23598800.

It is an arithmetic number, because the mean of its divisors is an integer number (707959980).

Almost surely, 2^6371639685 is an apocalyptic number.

It is an amenable number.

6371639685 is a deficient number, since it is larger than the sum of its proper divisors (4955719995).

6371639685 is a wasteful number, since it uses less digits than its factorization.

6371639685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47197345 (or 47197339 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 6371639685 is about 79822.5512308395. The cubic root of 6371639685 is about 1853.8890367288.

The spelling of 6371639685 in words is "six billion, three hundred seventy-one million, six hundred thirty-nine thousand, six hundred eighty-five".