9165097681 has 4 divisors (see below), whose sum is σ = 9704221092. Its totient is φ = 8625974272.

The previous prime is 9165097657. The next prime is 9165097699. The reversal of 9165097681 is 1867905619.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2508006400 + 6657091281 = 50080^2 + 81591^2 .

It is a cyclic number.

It is not a de Polignac number, because 9165097681 - 2⁷ = 9165097553 is a prime.

It is a super-2 number, since 2×9165097681² (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 (9165097631) 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, 269561680 + ... + 269561713.

It is an arithmetic number, because the mean of its divisors is an integer number (2426055273).

Almost surely, 2^9165097681 is an apocalyptic number.

It is an amenable number.

9165097681 is a deficient number, since it is larger than the sum of its proper divisors (539123411).

9165097681 is a wasteful number, since it uses less digits than its factorization.

9165097681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539123410.

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 9165097681 is about 95734.5166645761. The cubic root of 9165097681 is about 2092.7259806748.

The spelling of 9165097681 in words is "nine billion, one hundred sixty-five million, ninety-seven thousand, six hundred eighty-one".