22857651638 has 16 divisors (see below), whose sum is σ = 35062341696. Its totient is φ = 11171796480.

The previous prime is 22857651617. The next prime is 22857651667. The reversal of 22857651638 is 83615675822.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a self number, because there is not a number n which added to its sum of digits gives 22857651638.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 369131 + ... + 426582.

It is an arithmetic number, because the mean of its divisors is an integer number (2191396356).

Almost surely, 2^22857651638 is an apocalyptic number.

22857651638 is a deficient number, since it is larger than the sum of its proper divisors (12204690058).

22857651638 is a wasteful number, since it uses less digits than its factorization.

22857651638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796039.

The product of its digits is 4838400, while the sum is 53.

The spelling of 22857651638 in words is "twenty-two billion, eight hundred fifty-seven million, six hundred fifty-one thousand, six hundred thirty-eight".