2564969773 has 2 divisors, whose sum is σ = 2564969774. Its totient is φ = 2564969772.

The previous prime is 2564969723. The next prime is 2564969837. The reversal of 2564969773 is 3779694652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1996481124 + 568488649 = 44682^2 + 23843^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564969773 - 2⁹ = 2564969261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564969713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282484886 + 1282484887.

It is an arithmetic number, because the mean of its divisors is an integer number (1282484887).

Almost surely, 2^2564969773 is an apocalyptic number.

It is an amenable number.

2564969773 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564969773 is an equidigital number, since it uses as much as digits as its factorization.

2564969773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17146080, while the sum is 58.

The square root of 2564969773 is about 50645.5306320311. The cubic root of 2564969773 is about 1368.8654134855.

The spelling of 2564969773 in words is "two billion, five hundred sixty-four million, nine hundred sixty-nine thousand, seven hundred seventy-three".