2568638886638 has 32 divisors (see below), whose sum is σ = 4209412015872. Its totient is φ = 1165845888000.

The previous prime is 2568638886637. The next prime is 2568638886641. The reversal of 2568638886638 is 8366888368652.

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 15 ways as a sum of consecutive naturals, for example, 80573870 + ... + 80605742.

It is an arithmetic number, because the mean of its divisors is an integer number (131544125496).

Almost surely, 2^{2568638886638} is an apocalyptic number.

2568638886638 is a deficient number, since it is larger than the sum of its proper divisors (1640773129234).

2568638886638 is a wasteful number, since it uses less digits than its factorization.

2568638886638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37160.

The product of its digits is 3822059520, while the sum is 77.

The spelling of 2568638886638 in words is "two trillion, five hundred sixty-eight billion, six hundred thirty-eight million, eight hundred eighty-six thousand, six hundred thirty-eight".