6444122563 has 4 divisors (see below), whose sum is σ = 6464711128. Its totient is φ = 6423534000.

The previous prime is 6444122549. The next prime is 6444122617. The reversal of 6444122563 is 3652214446.

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-6444122563 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (6444122513) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10293813 + ... + 10294438.

It is an arithmetic number, because the mean of its divisors is an integer number (1616177782).

Almost surely, 2^6444122563 is an apocalyptic number.

6444122563 is a deficient number, since it is larger than the sum of its proper divisors (20588565).

6444122563 is a wasteful number, since it uses less digits than its factorization.

6444122563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20588564.

The product of its digits is 138240, while the sum is 37.

The square root of 6444122563 is about 80275.2923569886. The cubic root of 6444122563 is about 1860.8924074486.

The spelling of 6444122563 in words is "six billion, four hundred forty-four million, one hundred twenty-two thousand, five hundred sixty-three".