6388542886 has 16 divisors (see below), whose sum is σ = 10471809600. Its totient is φ = 2898930280.

The previous prime is 6388542883. The next prime is 6388542911. The reversal of 6388542886 is 6882458836.

It is a super-2 number, since 2×6388542886² = 81626960412522417992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6388542886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6388542883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234436 + ... + 260263.

It is an arithmetic number, because the mean of its divisors is an integer number (654488100).

Almost surely, 2^6388542886 is an apocalyptic number.

6388542886 is a deficient number, since it is larger than the sum of its proper divisors (4083266714).

6388542886 is a wasteful number, since it uses less digits than its factorization.

6388542886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495299.

The product of its digits is 17694720, while the sum is 58.

The square root of 6388542886 is about 79928.3609615511. The cubic root of 6388542886 is about 1855.5269714169.

The spelling of 6388542886 in words is "six billion, three hundred eighty-eight million, five hundred forty-two thousand, eight hundred eighty-six".