8921568736 has 24 divisors (see below), whose sum is σ = 17609515560. Its totient is φ = 4449310848.

The previous prime is 8921568713. The next prime is 8921568743. The reversal of 8921568736 is 6378651298.

It is a super-2 number, since 2×8921568736² (a number of 21 digits) contains 22 as substring.

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, 345906 + ... + 370801.

It is an arithmetic number, because the mean of its divisors is an integer number (733729815).

Almost surely, 2^8921568736 is an apocalyptic number.

It is an amenable number.

8921568736 is a deficient number, since it is larger than the sum of its proper divisors (8687946824).

8921568736 is a wasteful number, since it uses less digits than its factorization.

8921568736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717106 (or 717098 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The square root of 8921568736 is about 94454.0562178248. The cubic root of 8921568736 is about 2074.0238296860.

The spelling of 8921568736 in words is "eight billion, nine hundred twenty-one million, five hundred sixty-eight thousand, seven hundred thirty-six".