22665255623 has 4 divisors (see below), whose sum is σ = 22780307880. Its totient is φ = 22550203368.

The previous prime is 22665255589. The next prime is 22665255637. The reversal of 22665255623 is 32655256622.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22665255623 - 2⁸ = 22665255367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22665255653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57525833 + ... + 57526226.

It is an arithmetic number, because the mean of its divisors is an integer number (5695076970).

Almost surely, 2^22665255623 is an apocalyptic number.

22665255623 is a deficient number, since it is larger than the sum of its proper divisors (115052257).

22665255623 is a wasteful number, since it uses less digits than its factorization.

22665255623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115052256.

The product of its digits is 1296000, while the sum is 44.

Subtracting 22665255623 from its reverse (32655256622), we obtain a palindrome (9990000999).

The spelling of 22665255623 in words is "twenty-two billion, six hundred sixty-five million, two hundred fifty-five thousand, six hundred twenty-three".