22445586649 has 4 divisors (see below), whose sum is σ = 23052224164. Its totient is φ = 21838949136.

The previous prime is 22445586637. The next prime is 22445586671. The reversal of 22445586649 is 94668554422.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13783934025 + 8661652624 = 117405^2 + 93068^2 .

It is a cyclic number.

It is not a de Polignac number, because 22445586649 - 2²³ = 22437198041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22445586649.

It is not an unprimeable number, because it can be changed into a prime (22445586689) 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, 303318702 + ... + 303318775.

It is an arithmetic number, because the mean of its divisors is an integer number (5763056041).

Almost surely, 2^22445586649 is an apocalyptic number.

It is an amenable number.

22445586649 is a deficient number, since it is larger than the sum of its proper divisors (606637515).

22445586649 is an equidigital number, since it uses as much as digits as its factorization.

22445586649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606637514.

The product of its digits is 16588800, while the sum is 55.

The spelling of 22445586649 in words is "twenty-two billion, four hundred forty-five million, five hundred eighty-six thousand, six hundred forty-nine".