8027644563 has 20 divisors (see below), whose sum is σ = 11995078480. Its totient is φ = 5350350672.

The previous prime is 8027644561. The next prime is 8027644601. The reversal of 8027644563 is 3654467208.

8027644563 is a `hidden beast` number, since 8 + 0 + 27 + 64 + 4 + 563 = 666.

It is not a de Polignac number, because 8027644563 - 2¹ = 8027644561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8027644561) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 361578 + ... + 383136.

It is an arithmetic number, because the mean of its divisors is an integer number (599753924).

Almost surely, 2^8027644563 is an apocalyptic number.

8027644563 is a deficient number, since it is larger than the sum of its proper divisors (3967433917).

8027644563 is a wasteful number, since it uses less digits than its factorization.

8027644563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26168 (or 26159 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The square root of 8027644563 is about 89597.1236312863. The cubic root of 8027644563 is about 2002.3010651177.

The spelling of 8027644563 in words is "eight billion, twenty-seven million, six hundred forty-four thousand, five hundred sixty-three".