22664488640 has 28 divisors (see below), whose sum is σ = 53969814336. Its totient is φ = 9065795328.

The previous prime is 22664488607. The next prime is 22664488643. The reversal of 22664488640 is 4688446622.

It is not an unprimeable number, because it can be changed into a prime (22664488643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35412944 + ... + 35413583.

Almost surely, 2^22664488640 is an apocalyptic number.

22664488640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22664488640 is an abundant number, since it is smaller than the sum of its proper divisors (31305325696).

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

22664488640 is an equidigital number, since it uses as much as digits as its factorization.

22664488640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70826544 (or 70826534 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 50.

The spelling of 22664488640 in words is "twenty-two billion, six hundred sixty-four million, four hundred eighty-eight thousand, six hundred forty".