6445264279 has 2 divisors, whose sum is σ = 6445264280. Its totient is φ = 6445264278.

The previous prime is 6445264271. The next prime is 6445264283. The reversal of 6445264279 is 9724625446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6445264279 - 2³ = 6445264271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6445264271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222632139 + 3222632140.

It is an arithmetic number, because the mean of its divisors is an integer number (3222632140).

Almost surely, 2^6445264279 is an apocalyptic number.

6445264279 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445264279 is an equidigital number, since it uses as much as digits as its factorization.

6445264279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 49.

The square root of 6445264279 is about 80282.4032961146. The cubic root of 6445264279 is about 1861.0023001016.

The spelling of 6445264279 in words is "six billion, four hundred forty-five million, two hundred sixty-four thousand, two hundred seventy-nine".