6444539297 has 32 divisors (see below), whose sum is σ = 7709894400. Its totient is φ = 5270323968.

The previous prime is 6444539291. The next prime is 6444539323. The reversal of 6444539297 is 7929354446.

It is not a de Polignac number, because 6444539297 - 2⁴ = 6444539281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444539291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7298018 + ... + 7298900.

It is an arithmetic number, because the mean of its divisors is an integer number (240934200).

Almost surely, 2^6444539297 is an apocalyptic number.

It is an amenable number.

6444539297 is a deficient number, since it is larger than the sum of its proper divisors (1265355103).

6444539297 is a wasteful number, since it uses less digits than its factorization.

6444539297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305.

The product of its digits is 6531840, while the sum is 53.

The square root of 6444539297 is about 80277.8879704742. The cubic root of 6444539297 is about 1860.9325205083.

The spelling of 6444539297 in words is "six billion, four hundred forty-four million, five hundred thirty-nine thousand, two hundred ninety-seven".