22641664545 has 24 divisors (see below), whose sum is σ = 41311108800. Its totient is φ = 11439998496.

The previous prime is 22641664543. The next prime is 22641664559. The reversal of 22641664545 is 54546614622.

22641664545 is a `hidden beast` number, since 2 + 2 + 6 + 41 + 6 + 64 + 545 = 666.

It is not a de Polignac number, because 22641664545 - 2¹ = 22641664543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 22641664545.

It is not an unprimeable number, because it can be changed into a prime (22641664543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13239885 + ... + 13241594.

It is an arithmetic number, because the mean of its divisors is an integer number (1721296200).

Almost surely, 2^22641664545 is an apocalyptic number.

It is an amenable number.

22641664545 is a deficient number, since it is larger than the sum of its proper divisors (18669444255).

22641664545 is a wasteful number, since it uses less digits than its factorization.

22641664545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26481509 (or 26481506 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 22641664545 in words is "twenty-two billion, six hundred forty-one million, six hundred sixty-four thousand, five hundred forty-five".