6404231767 has 2 divisors, whose sum is σ = 6404231768. Its totient is φ = 6404231766.

The previous prime is 6404231747. The next prime is 6404231807. The reversal of 6404231767 is 7671324046.

6404231767 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (6404231807) can be obtained adding 6404231767 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6404231767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6404231747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202115883 + 3202115884.

It is an arithmetic number, because the mean of its divisors is an integer number (3202115884).

Almost surely, 2^6404231767 is an apocalyptic number.

6404231767 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404231767 is an equidigital number, since it uses as much as digits as its factorization.

6404231767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 6404231767 is about 80026.4441731607. Note that the first 3 decimals coincide. The cubic root of 6404231767 is about 1857.0446541707.

The spelling of 6404231767 in words is "six billion, four hundred four million, two hundred thirty-one thousand, seven hundred sixty-seven".