6446531323 has 4 divisors (see below), whose sum is σ = 6446871000. Its totient is φ = 6446191648.

The previous prime is 6446531243. The next prime is 6446531341. The reversal of 6446531323 is 3231356446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6446531323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6446531383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139573 + ... + 179926.

It is an arithmetic number, because the mean of its divisors is an integer number (1611717750).

Almost surely, 2^6446531323 is an apocalyptic number.

6446531323 is a deficient number, since it is larger than the sum of its proper divisors (339677).

6446531323 is a wasteful number, since it uses less digits than its factorization.

6446531323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339676.

The product of its digits is 155520, while the sum is 37.

The square root of 6446531323 is about 80290.2940771797. The cubic root of 6446531323 is about 1861.1242406561.

Adding to 6446531323 its reverse (3231356446), we get a palindrome (9677887769).

The spelling of 6446531323 in words is "six billion, four hundred forty-six million, five hundred thirty-one thousand, three hundred twenty-three".