2568638886639 has 32 divisors (see below), whose sum is σ = 4091550326784. Its totient is φ = 1401482644320.

The previous prime is 2568638886637. The next prime is 2568638886641. The reversal of 2568638886639 is 9366888368652.

It is an interprime number because it is at equal distance from previous prime (2568638886637) and next prime (2568638886641).

It is not a de Polignac number, because 2568638886639 - 2¹ = 2568638886637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568638886637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4451067 + ... + 4994924.

It is an arithmetic number, because the mean of its divisors is an integer number (127860947712).

Almost surely, 2^{2568638886639} is an apocalyptic number.

2568638886639 is a deficient number, since it is larger than the sum of its proper divisors (1522911440145).

2568638886639 is a wasteful number, since it uses less digits than its factorization.

2568638886639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9446587.

The product of its digits is 4299816960, while the sum is 78.

The spelling of 2568638886639 in words is "two trillion, five hundred sixty-eight billion, six hundred thirty-eight million, eight hundred eighty-six thousand, six hundred thirty-nine".