9916531640065 has 16 divisors (see below), whose sum is σ = 12266605723392. Its totient is φ = 7691868467584.

The previous prime is 9916531640063. The next prime is 9916531640083. The reversal of 9916531640065 is 5600461356199.

It is a cyclic number.

It is not a de Polignac number, because 9916531640065 - 2¹ = 9916531640063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9916531639988 and 9916531640015.

It is not an unprimeable number, because it can be changed into a prime (9916531640063) 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, 197161804 + ... + 197212093.

It is an arithmetic number, because the mean of its divisors is an integer number (766662857712).

Almost surely, 2^{9916531640065} is an apocalyptic number.

It is an amenable number.

9916531640065 is a deficient number, since it is larger than the sum of its proper divisors (2350074083327).

9916531640065 is a wasteful number, since it uses less digits than its factorization.

9916531640065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394374056.

The product of its (nonzero) digits is 5248800, while the sum is 55.

The spelling of 9916531640065 in words is "nine trillion, nine hundred sixteen billion, five hundred thirty-one million, six hundred forty thousand, sixty-five".