6404268109 has 2 divisors, whose sum is σ = 6404268110. Its totient is φ = 6404268108.

The previous prime is 6404268043. The next prime is 6404268119. The reversal of 6404268109 is 9018624046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4608373225 + 1795894884 = 67885^2 + 42378^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404268109 - 2²⁵ = 6370713677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6404268119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202134054 + 3202134055.

It is an arithmetic number, because the mean of its divisors is an integer number (3202134055).

Almost surely, 2^6404268109 is an apocalyptic number.

It is an amenable number.

6404268109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404268109 is an equidigital number, since it uses as much as digits as its factorization.

6404268109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 6404268109 is about 80026.6712352826. The cubic root of 6404268109 is about 1857.0481668788.

The spelling of 6404268109 in words is "six billion, four hundred four million, two hundred sixty-eight thousand, one hundred nine".