22644353137 has 4 divisors (see below), whose sum is σ = 25879260736. Its totient is φ = 19409445540.

The previous prime is 22644353129. The next prime is 22644353161. The reversal of 22644353137 is 73135344622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22644353137 - 2³ = 22644353129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22644353137.

It is not an unprimeable number, because it can be changed into a prime (22644353437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617453789 + ... + 1617453802.

It is an arithmetic number, because the mean of its divisors is an integer number (6469815184).

Almost surely, 2^22644353137 is an apocalyptic number.

It is an amenable number.

22644353137 is a deficient number, since it is larger than the sum of its proper divisors (3234907599).

22644353137 is an equidigital number, since it uses as much as digits as its factorization.

22644353137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234907598.

The product of its digits is 362880, while the sum is 40.

Adding to 22644353137 its reverse (73135344622), we get a palindrome (95779697759).

The spelling of 22644353137 in words is "twenty-two billion, six hundred forty-four million, three hundred fifty-three thousand, one hundred thirty-seven".