6444013255 has 16 divisors (see below), whose sum is σ = 8089974144. Its totient is φ = 4922456320.

The previous prime is 6444013189. The next prime is 6444013259. The reversal of 6444013255 is 5523104446.

It is not a de Polignac number, because 6444013255 - 2⁷ = 6444013127 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 6444013255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444013259) 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, 324772 + ... + 344041.

It is an arithmetic number, because the mean of its divisors is an integer number (505623384).

Almost surely, 2^6444013255 is an apocalyptic number.

6444013255 is a deficient number, since it is larger than the sum of its proper divisors (1645960889).

6444013255 is a wasteful number, since it uses less digits than its factorization.

6444013255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668906.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 6444013255 is about 80274.6115219501. The cubic root of 6444013255 is about 1860.8818856345.

The spelling of 6444013255 in words is "six billion, four hundred forty-four million, thirteen thousand, two hundred fifty-five".