22638818555 has 8 divisors (see below), whose sum is σ = 27179062800. Its totient is φ = 18102734496.

The previous prime is 22638818513. The next prime is 22638818563. The reversal of 22638818555 is 55581883622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22638818555 is a prime.

It is a super-2 number, since 2×22638818555² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22638818497 and 22638818506.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1028060 + ... + 1049849.

It is an arithmetic number, because the mean of its divisors is an integer number (3397382850).

Almost surely, 2^22638818555 is an apocalyptic number.

22638818555 is a deficient number, since it is larger than the sum of its proper divisors (4540244245).

22638818555 is a wasteful number, since it uses less digits than its factorization.

22638818555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080093.

The product of its digits is 4608000, while the sum is 53.

The spelling of 22638818555 in words is "twenty-two billion, six hundred thirty-eight million, eight hundred eighteen thousand, five hundred fifty-five".