6460944389 has 2 divisors, whose sum is σ = 6460944390. Its totient is φ = 6460944388.

The previous prime is 6460944353. The next prime is 6460944419. The reversal of 6460944389 is 9834490646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5590104289 + 870840100 = 74767^2 + 29510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6460944389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6460944389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6460944689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3230472194 + 3230472195.

It is an arithmetic number, because the mean of its divisors is an integer number (3230472195).

Almost surely, 2^6460944389 is an apocalyptic number.

It is an amenable number.

6460944389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6460944389 is an equidigital number, since it uses as much as digits as its factorization.

6460944389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The square root of 6460944389 is about 80379.9999315750. Note that the first 4 decimals coincide. The cubic root of 6460944389 is about 1862.5102335609.

The spelling of 6460944389 in words is "six billion, four hundred sixty million, nine hundred forty-four thousand, three hundred eighty-nine".