6404490371 has 2 divisors, whose sum is σ = 6404490372. Its totient is φ = 6404490370.

The previous prime is 6404490349. The next prime is 6404490377. The reversal of 6404490371 is 1730944046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6404490371 - 2⁶ = 6404490307 is a prime.

It is not a weakly prime, because it can be changed into another prime (6404490377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202245185 + 3202245186.

It is an arithmetic number, because the mean of its divisors is an integer number (3202245186).

Almost surely, 2^6404490371 is an apocalyptic number.

6404490371 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404490371 is an equidigital number, since it uses as much as digits as its factorization.

6404490371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 6404490371 is about 80028.0598977634. The cubic root of 6404490371 is about 1857.0696497637.

The spelling of 6404490371 in words is "six billion, four hundred four million, four hundred ninety thousand, three hundred seventy-one".