9516995821 has 8 divisors (see below), whose sum is σ = 9959241600. Its totient is φ = 9077122032.

The previous prime is 9516995819. The next prime is 9516995837. The reversal of 9516995821 is 1285996159.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9516995821 - 2¹ = 9516995819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9516993821) 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, 584785 + ... + 600838.

It is an arithmetic number, because the mean of its divisors is an integer number (1244905200).

Almost surely, 2^9516995821 is an apocalyptic number.

It is an amenable number.

9516995821 is a deficient number, since it is larger than the sum of its proper divisors (442245779).

9516995821 is a wasteful number, since it uses less digits than its factorization.

9516995821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185995.

The product of its digits is 1749600, while the sum is 55.

The square root of 9516995821 is about 97555.0912100440. The cubic root of 9516995821 is about 2119.1740449419.

The spelling of 9516995821 in words is "nine billion, five hundred sixteen million, nine hundred ninety-five thousand, eight hundred twenty-one".