6445335445 has 8 divisors (see below), whose sum is σ = 7740765144. Its totient is φ = 5152026624.

The previous prime is 6445335437. The next prime is 6445335451. The reversal of 6445335445 is 5445335446.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 59567524 + 6385767921 = 7718^2 + 79911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6445335445 - 2³ = 6445335437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523524 + ... + 535693.

It is an arithmetic number, because the mean of its divisors is an integer number (967595643).

Almost surely, 2^6445335445 is an apocalyptic number.

It is an amenable number.

6445335445 is a deficient number, since it is larger than the sum of its proper divisors (1295429699).

6445335445 is a wasteful number, since it uses less digits than its factorization.

6445335445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060439.

The product of its digits is 1728000, while the sum is 43.

The square root of 6445335445 is about 80282.8465177961. The cubic root of 6445335445 is about 1861.0091495545.

Subtracting from 6445335445 its reverse (5445335446), we obtain a palindrome (999999999).

The spelling of 6445335445 in words is "six billion, four hundred forty-five million, three hundred thirty-five thousand, four hundred forty-five".