6434040013 has 4 divisors (see below), whose sum is σ = 6434212768. Its totient is φ = 6433867260.

The previous prime is 6434040007. The next prime is 6434040023. The reversal of 6434040013 is 3100404346.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6434040013 - 2⁵ = 6434039981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6434040013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6434040023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4881 + ... + 113542.

It is an arithmetic number, because the mean of its divisors is an integer number (1608553192).

Almost surely, 2^6434040013 is an apocalyptic number.

It is an amenable number.

6434040013 is a deficient number, since it is larger than the sum of its proper divisors (172755).

6434040013 is a wasteful number, since it uses less digits than its factorization.

6434040013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172754.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 6434040013 is about 80212.4679398409. The cubic root of 6434040013 is about 1859.9213761231.

Adding to 6434040013 its reverse (3100404346), we get a palindrome (9534444359).

The spelling of 6434040013 in words is "six billion, four hundred thirty-four million, forty thousand, thirteen".