6444135256 has 16 divisors (see below), whose sum is σ = 13012196400. Its totient is φ = 2974216224.

The previous prime is 6444135233. The next prime is 6444135283. The reversal of 6444135256 is 6525314446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30981316 + ... + 30981523.

It is an arithmetic number, because the mean of its divisors is an integer number (813262275).

Almost surely, 2^6444135256 is an apocalyptic number.

It is an amenable number.

6444135256 is an abundant number, since it is smaller than the sum of its proper divisors (6568061144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6444135256 is a wasteful number, since it uses less digits than its factorization.

6444135256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61962858 (or 61962854 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

The square root of 6444135256 is about 80275.3714161448. The cubic root of 6444135256 is about 1860.8936292488.

The spelling of 6444135256 in words is "six billion, four hundred forty-four million, one hundred thirty-five thousand, two hundred fifty-six".