16221613264 has 40 divisors (see below), whose sum is σ = 32215313088. Its totient is φ = 7908222720.

The previous prime is 16221613249. The next prime is 16221613321. The reversal of 16221613264 is 46231612261.

It is a congruent number.

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, 1244509 + ... + 1257475.

Almost surely, 2^16221613264 is an apocalyptic number.

It is an amenable number.

16221613264 is a deficient number, since it is larger than the sum of its proper divisors (15993699824).

16221613264 is a wasteful number, since it uses less digits than its factorization.

16221613264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14923 (or 14917 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The spelling of 16221613264 in words is "sixteen billion, two hundred twenty-one million, six hundred thirteen thousand, two hundred sixty-four".