2566312638 has 8 divisors (see below), whose sum is σ = 5132625288. Its totient is φ = 855437544.

The previous prime is 2566312583. The next prime is 2566312643. The reversal of 2566312638 is 8362136652.

It is a sphenic number, since it is the product of 3 distinct primes.

2566312638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 2566312638.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 213859381 + ... + 213859392.

It is an arithmetic number, because the mean of its divisors is an integer number (641578161).

Almost surely, 2^2566312638 is an apocalyptic number.

2566312638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2566312638 is a wasteful number, since it uses less digits than its factorization.

2566312638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427718778.

The product of its digits is 311040, while the sum is 42.

The square root of 2566312638 is about 50658.7863849895. The cubic root of 2566312638 is about 1369.1042572041.

The spelling of 2566312638 in words is "two billion, five hundred sixty-six million, three hundred twelve thousand, six hundred thirty-eight".