6404857279 has 2 divisors, whose sum is σ = 6404857280. Its totient is φ = 6404857278.

The previous prime is 6404857243. The next prime is 6404857309. The reversal of 6404857279 is 9727584046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6404857279 - 2²⁹ = 5867986367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6404857229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202428639 + 3202428640.

It is an arithmetic number, because the mean of its divisors is an integer number (3202428640).

Almost surely, 2^6404857279 is an apocalyptic number.

6404857279 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404857279 is an equidigital number, since it uses as much as digits as its factorization.

6404857279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The square root of 6404857279 is about 80030.3522358861. The cubic root of 6404857279 is about 1857.1051124188.

The spelling of 6404857279 in words is "six billion, four hundred four million, eight hundred fifty-seven thousand, two hundred seventy-nine".