24221256664 has 16 divisors (see below), whose sum is σ = 49543479720. Its totient is φ = 11009662080.

The previous prime is 24221256643. The next prime is 24221256671. The reversal of 24221256664 is 46665212242.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137620689 + ... + 137620864.

Almost surely, 2^24221256664 is an apocalyptic number.

It is an amenable number.

24221256664 is an abundant number, since it is smaller than the sum of its proper divisors (25322223056).

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

24221256664 is a wasteful number, since it uses less digits than its factorization.

24221256664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275241570 (or 275241566 counting only the distinct ones).

The product of its digits is 276480, while the sum is 40.

The spelling of 24221256664 in words is "twenty-four billion, two hundred twenty-one million, two hundred fifty-six thousand, six hundred sixty-four".