2564012863 has 2 divisors, whose sum is σ = 2564012864. Its totient is φ = 2564012862.

The previous prime is 2564012819. The next prime is 2564012903. The reversal of 2564012863 is 3682104652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2564012863 - 2¹³ = 2564004671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564012813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282006431 + 1282006432.

It is an arithmetic number, because the mean of its divisors is an integer number (1282006432).

Almost surely, 2^2564012863 is an apocalyptic number.

2564012863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564012863 is an equidigital number, since it uses as much as digits as its factorization.

2564012863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 2564012863 is about 50636.0826190178. The cubic root of 2564012863 is about 1368.6951653547.

It can be divided in two parts, 25640 and 12863, that added together give a triangular number (38503 = T₂₇₇).

The spelling of 2564012863 in words is "two billion, five hundred sixty-four million, twelve thousand, eight hundred sixty-three".