9115016681 has 4 divisors (see below), whose sum is σ = 9140838612. Its totient is φ = 9089194752.

The previous prime is 9115016663. The next prime is 9115016717. The reversal of 9115016681 is 1866105119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1866105119 = 41 ⋅45514759.

It can be written as a sum of positive squares in 2 ways, for example, as 4366566400 + 4748450281 = 66080^2 + 68909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9115016681 is a prime.

It is a super-2 number, since 2×9115016681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9115016611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12910436 + ... + 12911141.

It is an arithmetic number, because the mean of its divisors is an integer number (2285209653).

Almost surely, 2^9115016681 is an apocalyptic number.

It is an amenable number.

9115016681 is a deficient number, since it is larger than the sum of its proper divisors (25821931).

9115016681 is a wasteful number, since it uses less digits than its factorization.

9115016681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25821930.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 9115016681 is about 95472.5964923967. The cubic root of 9115016681 is about 2088.9072438205.

The spelling of 9115016681 in words is "nine billion, one hundred fifteen million, sixteen thousand, six hundred eighty-one".