2564546623 has 2 divisors, whose sum is σ = 2564546624. Its totient is φ = 2564546622.

The previous prime is 2564546609. The next prime is 2564546629. The reversal of 2564546623 is 3266454652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2564546623 - 2²¹ = 2562449471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2564546623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564546629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282273311 + 1282273312.

It is an arithmetic number, because the mean of its divisors is an integer number (1282273312).

Almost surely, 2^2564546623 is an apocalyptic number.

2564546623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564546623 is an equidigital number, since it uses as much as digits as its factorization.

2564546623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 43.

The square root of 2564546623 is about 50641.3528946453. The cubic root of 2564546623 is about 1368.7901342026.

The spelling of 2564546623 in words is "two billion, five hundred sixty-four million, five hundred forty-six thousand, six hundred twenty-three".