6445335447 has 6 divisors (see below), whose sum is σ = 9309928992. Its totient is φ = 4296890292.

The previous prime is 6445335437. The next prime is 6445335451. The reversal of 6445335447 is 7445335446.

6445335447 is a `hidden beast` number, since 64 + 4 + 533 + 54 + 4 + 7 = 666.

It is not a de Polignac number, because 6445335447 - 2⁴ = 6445335431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445335427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 358074183 + ... + 358074200.

It is an arithmetic number, because the mean of its divisors is an integer number (1551654832).

Almost surely, 2^6445335447 is an apocalyptic number.

6445335447 is a deficient number, since it is larger than the sum of its proper divisors (2864593545).

6445335447 is a wasteful number, since it uses less digits than its factorization.

6445335447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716148389 (or 716148386 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 45.

The square root of 6445335447 is about 80282.8465302520. The cubic root of 6445335447 is about 1861.0091497470.

Subtracting 6445335447 from its reverse (7445335446), we obtain a palindrome (999999999).

The spelling of 6445335447 in words is "six billion, four hundred forty-five million, three hundred thirty-five thousand, four hundred forty-seven".