6404039461 has 2 divisors, whose sum is σ = 6404039462. Its totient is φ = 6404039460.

The previous prime is 6404039459. The next prime is 6404039501. The reversal of 6404039461 is 1649304046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3980348100 + 2423691361 = 63090^2 + 49231^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404039461 - 2¹ = 6404039459 is a prime.

Together with 6404039459, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6404039461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6404039401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202019730 + 3202019731.

It is an arithmetic number, because the mean of its divisors is an integer number (3202019731).

Almost surely, 2^6404039461 is an apocalyptic number.

It is an amenable number.

6404039461 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404039461 is an equidigital number, since it uses as much as digits as its factorization.

6404039461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 6404039461 is about 80025.2426488043. The cubic root of 6404039461 is about 1857.0260662320.

The spelling of 6404039461 in words is "six billion, four hundred four million, thirty-nine thousand, four hundred sixty-one".