6446004013 has 2 divisors, whose sum is σ = 6446004014. Its totient is φ = 6446004012.

The previous prime is 6446004007. The next prime is 6446004073. The reversal of 6446004013 is 3104006446.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6438939049 + 7064964 = 80243^2 + 2658^2 .

It is a cyclic number.

It is not a de Polignac number, because 6446004013 - 2¹³ = 6445995821 is a prime.

It is a super-2 number, since 2×6446004013² = 83101935471224208338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6446004073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223002006 + 3223002007.

It is an arithmetic number, because the mean of its divisors is an integer number (3223002007).

Almost surely, 2^6446004013 is an apocalyptic number.

It is an amenable number.

6446004013 is a deficient number, since it is larger than the sum of its proper divisors (1).

6446004013 is an equidigital number, since it uses as much as digits as its factorization.

6446004013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 6446004013 is about 80287.0102382696. The cubic root of 6446004013 is about 1861.0734941831.

The spelling of 6446004013 in words is "six billion, four hundred forty-six million, four thousand, thirteen".