6444718129 has 16 divisors (see below), whose sum is σ = 6823586880. Its totient is φ = 6069911040.

The previous prime is 6444718087. The next prime is 6444718153. The reversal of 6444718129 is 9218174446.

It is a cyclic number.

It is not a de Polignac number, because 6444718129 - 2²⁷ = 6310500401 is a prime.

It is a super-2 number, since 2×6444718129² = 83068783524522521282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444718429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5022522 + ... + 5023804.

It is an arithmetic number, because the mean of its divisors is an integer number (426474180).

Almost surely, 2^6444718129 is an apocalyptic number.

It is an amenable number.

6444718129 is a deficient number, since it is larger than the sum of its proper divisors (378868751).

6444718129 is a wasteful number, since it uses less digits than its factorization.

6444718129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640.

The product of its digits is 387072, while the sum is 46.

The square root of 6444718129 is about 80279.0017937443. The cubic root of 6444718129 is about 1860.9497335932.

The spelling of 6444718129 in words is "six billion, four hundred forty-four million, seven hundred eighteen thousand, one hundred twenty-nine".