6389759988 has 18 divisors (see below), whose sum is σ = 16151893394. Its totient is φ = 2129919984.

The previous prime is 6389759963. The next prime is 6389759989. The reversal of 6389759988 is 8899579836.

It can be written as a sum of positive squares in only one way, i.e., 3357275364 + 3032484624 = 57942^2 + 55068^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6389759989) 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, 88746631 + ... + 88746702.

Almost surely, 2^6389759988 is an apocalyptic number.

It is an amenable number.

6389759988 is an abundant number, since it is smaller than the sum of its proper divisors (9762133406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6389759988 is a wasteful number, since it uses less digits than its factorization.

6389759988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177493343 (or 177493338 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 72.

The square root of 6389759988 is about 79935.9743044394. The cubic root of 6389759988 is about 1855.6447980860.

The spelling of 6389759988 in words is "six billion, three hundred eighty-nine million, seven hundred fifty-nine thousand, nine hundred eighty-eight".