6444514257 has 16 divisors (see below), whose sum is σ = 8828028672. Its totient is φ = 4178753280.

The previous prime is 6444514249. The next prime is 6444514301. The reversal of 6444514257 is 7524154446.

It is not a de Polignac number, because 6444514257 - 2³ = 6444514249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6444514217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369657 + ... + 386697.

It is an arithmetic number, because the mean of its divisors is an integer number (551751792).

Almost surely, 2^6444514257 is an apocalyptic number.

It is an amenable number.

6444514257 is a deficient number, since it is larger than the sum of its proper divisors (2383514415).

6444514257 is a wasteful number, since it uses less digits than its factorization.

6444514257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20488.

The product of its digits is 537600, while the sum is 42.

The square root of 6444514257 is about 80277.7320120592. The cubic root of 6444514257 is about 1860.9301103122.

The spelling of 6444514257 in words is "six billion, four hundred forty-four million, five hundred fourteen thousand, two hundred fifty-seven".