22664005440 has 112 divisors (see below), whose sum is σ = 72331649088. Its totient is φ = 6012370944.

The previous prime is 22664005439. The next prime is 22664005451. The reversal of 22664005440 is 4450046622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124119 + ... + 246441.

Almost surely, 2^22664005440 is an apocalyptic number.

22664005440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22664005440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36165824544).

22664005440 is an abundant number, since it is smaller than the sum of its proper divisors (49667643648).

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

22664005440 is a wasteful number, since it uses less digits than its factorization.

22664005440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122536 (or 122526 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The spelling of 22664005440 in words is "twenty-two billion, six hundred sixty-four million, five thousand, four hundred forty".