8217264681 has 6 divisors (see below), whose sum is σ = 11869382330. Its totient is φ = 5478176448.

The previous prime is 8217264631. The next prime is 8217264749. The reversal of 8217264681 is 1864627128.

It can be written as a sum of positive squares in only one way, i.e., 7019758656 + 1197506025 = 83784^2 + 34605^2 .

It is not a de Polignac number, because 8217264681 - 2¹⁴ = 8217248297 is a prime.

It is a super-2 number, since 2×8217264681² (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 (8217264631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 456514696 + ... + 456514713.

Almost surely, 2^8217264681 is an apocalyptic number.

It is an amenable number.

8217264681 is a deficient number, since it is larger than the sum of its proper divisors (3652117649).

8217264681 is a wasteful number, since it uses less digits than its factorization.

8217264681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913029415 (or 913029412 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 8217264681 is about 90649.1295104371. The cubic root of 8217264681 is about 2017.9439165415.

The spelling of 8217264681 in words is "eight billion, two hundred seventeen million, two hundred sixty-four thousand, six hundred eighty-one".