2565264551 has 2 divisors, whose sum is σ = 2565264552. Its totient is φ = 2565264550.

The previous prime is 2565264523. The next prime is 2565264643. The reversal of 2565264551 is 1554625652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2565264551 - 2²⁶ = 2498155687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2565264499 and 2565264508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565264511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282632275 + 1282632276.

It is an arithmetic number, because the mean of its divisors is an integer number (1282632276).

Almost surely, 2^2565264551 is an apocalyptic number.

2565264551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565264551 is an equidigital number, since it uses as much as digits as its factorization.

2565264551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360000, while the sum is 41.

The square root of 2565264551 is about 50648.4407558614. The cubic root of 2565264551 is about 1368.9178502246.

The spelling of 2565264551 in words is "two billion, five hundred sixty-five million, two hundred sixty-four thousand, five hundred fifty-one".