6386861944 has 16 divisors (see below), whose sum is σ = 11981374920. Its totient is φ = 3191828640.

The previous prime is 6386861941. The next prime is 6386861953. The reversal of 6386861944 is 4491686836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6386861941) 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, 183267 + ... + 215314.

Almost surely, 2^6386861944 is an apocalyptic number.

It is an amenable number.

6386861944 is a deficient number, since it is larger than the sum of its proper divisors (5594512976).

6386861944 is a wasteful number, since it uses less digits than its factorization.

6386861944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400590 (or 400586 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 55.

The square root of 6386861944 is about 79917.8449659399. The cubic root of 6386861944 is about 1855.3642161600.

The spelling of 6386861944 in words is "six billion, three hundred eighty-six million, eight hundred sixty-one thousand, nine hundred forty-four".