10644564447 has 36 divisors (see below), whose sum is σ = 17357154360. Its totient is φ = 6276869280.

The previous prime is 10644564407. The next prime is 10644564449. The reversal of 10644564447 is 74446544601.

10644564447 is a `hidden beast` number, since 1 + 0 + 6 + 44 + 564 + 4 + 47 = 666.

It is not a de Polignac number, because 10644564447 - 2¹⁴ = 10644548063 is a prime.

It is a super-2 number, since 2×10644564447² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10644564449) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 91797 + ... + 172382.

Almost surely, 2^10644564447 is an apocalyptic number.

10644564447 is a deficient number, since it is larger than the sum of its proper divisors (6712589913).

10644564447 is a wasteful number, since it uses less digits than its factorization.

10644564447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264244 (or 264230 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 45.

The spelling of 10644564447 in words is "ten billion, six hundred forty-four million, five hundred sixty-four thousand, four hundred forty-seven".