2566312639 has 16 divisors (see below), whose sum is σ = 3012905376. Its totient is φ = 2159769600.

The previous prime is 2566312583. The next prime is 2566312643. The reversal of 2566312639 is 9362136652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2566312639 is a prime.

It is a super-2 number, since 2×2566312639² = 13171921122182288642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2566312595 and 2566312604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566312669) 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, 101082 + ... + 123895.

It is an arithmetic number, because the mean of its divisors is an integer number (188306586).

Almost surely, 2^2566312639 is an apocalyptic number.

2566312639 is a deficient number, since it is larger than the sum of its proper divisors (446592737).

2566312639 is a wasteful number, since it uses less digits than its factorization.

2566312639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225066.

The product of its digits is 349920, while the sum is 43.

The square root of 2566312639 is about 50658.7863948595. The cubic root of 2566312639 is about 1369.1042573819.

The spelling of 2566312639 in words is "two billion, five hundred sixty-six million, three hundred twelve thousand, six hundred thirty-nine".