22778686228 has 6 divisors (see below), whose sum is σ = 39862700906. Its totient is φ = 11389343112.

The previous prime is 22778686219. The next prime is 22778686283. The reversal of 22778686228 is 82268687722.

It can be written as a sum of positive squares in only one way, i.e., 22240353424 + 538332804 = 149132^2 + 23202^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2847335775 + ... + 2847335782.

Almost surely, 2^22778686228 is an apocalyptic number.

It is an amenable number.

22778686228 is a deficient number, since it is larger than the sum of its proper divisors (17084014678).

22778686228 is a wasteful number, since it uses less digits than its factorization.

22778686228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5694671561 (or 5694671559 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 58.

The spelling of 22778686228 in words is "twenty-two billion, seven hundred seventy-eight million, six hundred eighty-six thousand, two hundred twenty-eight".