9969315681 has 16 divisors (see below), whose sum is σ = 14664061440. Its totient is φ = 5985329280.

The previous prime is 9969315673. The next prime is 9969315689. The reversal of 9969315681 is 1865139699.

It is an interprime number because it is at equal distance from previous prime (9969315673) and next prime (9969315689).

It is not a de Polignac number, because 9969315681 - 2³ = 9969315673 is a prime.

It is a super-2 number, since 2×9969315681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9969315689) 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, 3115761 + ... + 3118958.

It is an arithmetic number, because the mean of its divisors is an integer number (916503840).

Almost surely, 2^9969315681 is an apocalyptic number.

It is an amenable number.

9969315681 is a deficient number, since it is larger than the sum of its proper divisors (4694745759).

9969315681 is a wasteful number, since it uses less digits than its factorization.

9969315681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234776.

The product of its digits is 3149280, while the sum is 57.

The square root of 9969315681 is about 99846.4605331606. The cubic root of 9969315681 is about 2152.2288536284.

The spelling of 9969315681 in words is "nine billion, nine hundred sixty-nine million, three hundred fifteen thousand, six hundred eighty-one".