2565266623 has 2 divisors, whose sum is σ = 2565266624. Its totient is φ = 2565266622.

The previous prime is 2565266597. The next prime is 2565266633. The reversal of 2565266623 is 3266625652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2565266623 - 2¹³ = 2565258431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2565266623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565266633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282633311 + 1282633312.

It is an arithmetic number, because the mean of its divisors is an integer number (1282633312).

Almost surely, 2^2565266623 is an apocalyptic number.

2565266623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565266623 is an equidigital number, since it uses as much as digits as its factorization.

2565266623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 43.

The square root of 2565266623 is about 50648.4612105837. The cubic root of 2565266623 is about 1368.9182187891.

The spelling of 2565266623 in words is "two billion, five hundred sixty-five million, two hundred sixty-six thousand, six hundred twenty-three".