2645040773 has 2 divisors, whose sum is σ = 2645040774. Its totient is φ = 2645040772.

The previous prime is 2645040743. The next prime is 2645040847. The reversal of 2645040773 is 3770405462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1578234529 + 1066806244 = 39727^2 + 32662^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645040773 - 2²² = 2640846469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2645040743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322520386 + 1322520387.

It is an arithmetic number, because the mean of its divisors is an integer number (1322520387).

Almost surely, 2^2645040773 is an apocalyptic number.

It is an amenable number.

2645040773 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645040773 is an equidigital number, since it uses as much as digits as its factorization.

2645040773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 38.

The square root of 2645040773 is about 51429.9598774878. The cubic root of 2645040773 is about 1382.9637300404.

The spelling of 2645040773 in words is "two billion, six hundred forty-five million, forty thousand, seven hundred seventy-three".