9721550716 has 24 divisors (see below), whose sum is σ = 18134816000. Its totient is φ = 4546651824.

The previous prime is 9721550701. The next prime is 9721550717. The reversal of 9721550716 is 6170551279.

It is a super-2 number, since 2×9721550716² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721550717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 803586 + ... + 815593.

Almost surely, 2^9721550716 is an apocalyptic number.

It is an amenable number.

9721550716 is a deficient number, since it is larger than the sum of its proper divisors (8413265284).

9721550716 is a wasteful number, since it uses less digits than its factorization.

9721550716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619281 (or 1619279 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 43.

The square root of 9721550716 is about 98597.9245014823. The cubic root of 9721550716 is about 2134.2494690739.

The spelling of 9721550716 in words is "nine billion, seven hundred twenty-one million, five hundred fifty thousand, seven hundred sixteen".