2645508773 has 2 divisors, whose sum is σ = 2645508774. Its totient is φ = 2645508772.

The previous prime is 2645508689. The next prime is 2645508779. The reversal of 2645508773 is 3778055462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2642679649 + 2829124 = 51407^2 + 1682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2645508773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2645508779) 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, 1322754386 + 1322754387.

It is an arithmetic number, because the mean of its divisors is an integer number (1322754387).

Almost surely, 2^2645508773 is an apocalyptic number.

It is an amenable number.

2645508773 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645508773 is an equidigital number, since it uses as much as digits as its factorization.

2645508773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1411200, while the sum is 47.

The square root of 2645508773 is about 51434.5095534117. The cubic root of 2645508773 is about 1383.0452900758.

The spelling of 2645508773 in words is "two billion, six hundred forty-five million, five hundred eight thousand, seven hundred seventy-three".