2565445292551 has 2 divisors, whose sum is σ = 2565445292552. Its totient is φ = 2565445292550.

The previous prime is 2565445292537. The next prime is 2565445292561. The reversal of 2565445292551 is 1552925445652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2565445292551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2565445292492 and 2565445292501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565445292521) 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, 1282722646275 + 1282722646276.

It is an arithmetic number, because the mean of its divisors is an integer number (1282722646276).

Almost surely, 2^{2565445292551} is an apocalyptic number.

2565445292551 is the 1013005-th centered pentagonal number.

2565445292551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565445292551 is an equidigital number, since it uses as much as digits as its factorization.

2565445292551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600000, while the sum is 55.

The spelling of 2565445292551 in words is "two trillion, five hundred sixty-five billion, four hundred forty-five million, two hundred ninety-two thousand, five hundred fifty-one".