2646365789 has 2 divisors, whose sum is σ = 2646365790. Its totient is φ = 2646365788.

The previous prime is 2646365669. The next prime is 2646365791. The reversal of 2646365789 is 9875636462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2368476889 + 277888900 = 48667^2 + 16670^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646365789 - 2²⁴ = 2629588573 is a prime.

It is a Sophie Germain prime.

Together with 2646365791, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2646365489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323182894 + 1323182895.

It is an arithmetic number, because the mean of its divisors is an integer number (1323182895).

Almost surely, 2^2646365789 is an apocalyptic number.

It is an amenable number.

2646365789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646365789 is an equidigital number, since it uses as much as digits as its factorization.

2646365789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 56.

The square root of 2646365789 is about 51442.8400168575. The cubic root of 2646365789 is about 1383.1946203906.

The spelling of 2646365789 in words is "two billion, six hundred forty-six million, three hundred sixty-five thousand, seven hundred eighty-nine".