22247810649 has 15 divisors (see below), whose sum is σ = 33236389263. Its totient is φ = 14830978824.

The previous prime is 22247810621. The next prime is 22247810659. The reversal of 22247810649 is 94601874222.

The square root of 22247810649 is 149157.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 15169617225 + 7078193424 = 123165^2 + 84132^2 .

It is not a de Polignac number, because 22247810649 - 2¹⁹ = 22247286361 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22247810659) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1334127 + ... + 1350699.

Almost surely, 2^22247810649 is an apocalyptic number.

22247810649 is the 149157-th square number.

22247810649 is the 74579-th centered octagonal number.

It is an amenable number.

22247810649 is a deficient number, since it is larger than the sum of its proper divisors (10988578614).

22247810649 is an frugal number, since it uses more digits than its factorization.

22247810649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33158 (or 16576 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 22247810649 in words is "twenty-two billion, two hundred forty-seven million, eight hundred ten thousand, six hundred forty-nine".