8921568616 has 64 divisors (see below), whose sum is σ = 17710617600. Its totient is φ = 4207526400.

The previous prime is 8921568611. The next prime is 8921568619. The reversal of 8921568616 is 6168651298.

It is not an unprimeable number, because it can be changed into a prime (8921568611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1564266 + ... + 1569958.

It is an arithmetic number, because the mean of its divisors is an integer number (276728400).

Almost surely, 2^8921568616 is an apocalyptic number.

It is an amenable number.

8921568616 is a deficient number, since it is larger than the sum of its proper divisors (8789048984).

8921568616 is a wasteful number, since it uses less digits than its factorization.

8921568616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5890 (or 5886 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 52.

The square root of 8921568616 is about 94454.0555825953. The cubic root of 8921568616 is about 2074.0238203870.

The spelling of 8921568616 in words is "eight billion, nine hundred twenty-one million, five hundred sixty-eight thousand, six hundred sixteen".