22557232644 has 24 divisors (see below), whose sum is σ = 52937787840. Its totient is φ = 7475613984.

The previous prime is 22557232601. The next prime is 22557232699. The reversal of 22557232644 is 44623275522.

It is a happy number.

It is a super-3 number, since 3×22557232644³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22557232596 and 22557232605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5430784 + ... + 5434935.

It is an arithmetic number, because the mean of its divisors is an integer number (2205741160).

Almost surely, 2^22557232644 is an apocalyptic number.

It is an amenable number.

22557232644 is an abundant number, since it is smaller than the sum of its proper divisors (30380555196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22557232644 is a wasteful number, since it uses less digits than its factorization.

22557232644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10865899 (or 10865897 counting only the distinct ones).

The product of its digits is 806400, while the sum is 42.

The spelling of 22557232644 in words is "twenty-two billion, five hundred fifty-seven million, two hundred thirty-two thousand, six hundred forty-four".