6446316563 has 4 divisors (see below), whose sum is σ = 6449389800. Its totient is φ = 6443243328.

The previous prime is 6446316551. The next prime is 6446316587. The reversal of 6446316563 is 3656136446.

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

It is a cyclic number.

It is not a de Polignac number, because 6446316563 - 2¹⁰ = 6446315539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6446316593) 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, 1533470 + ... + 1537667.

It is an arithmetic number, because the mean of its divisors is an integer number (1612347450).

Almost surely, 2^6446316563 is an apocalyptic number.

6446316563 is a deficient number, since it is larger than the sum of its proper divisors (3073237).

6446316563 is a wasteful number, since it uses less digits than its factorization.

6446316563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073236.

The product of its digits is 933120, while the sum is 44.

The square root of 6446316563 is about 80288.9566690214. The cubic root of 6446316563 is about 1861.1035732377.

The spelling of 6446316563 in words is "six billion, four hundred forty-six million, three hundred sixteen thousand, five hundred sixty-three".