22566389638 has 8 divisors (see below), whose sum is σ = 36453398688. Its totient is φ = 10415256744.

The previous prime is 22566389621. The next prime is 22566389641. The reversal of 22566389638 is 83698366522.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433969006 + ... + 433969057.

It is an arithmetic number, because the mean of its divisors is an integer number (4556674836).

Almost surely, 2^22566389638 is an apocalyptic number.

22566389638 is a deficient number, since it is larger than the sum of its proper divisors (13887009050).

22566389638 is a wasteful number, since it uses less digits than its factorization.

22566389638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867938078.

The product of its digits is 22394880, while the sum is 58.

The spelling of 22566389638 in words is "twenty-two billion, five hundred sixty-six million, three hundred eighty-nine thousand, six hundred thirty-eight".