9812685481 has 9 divisors (see below), whose sum is σ = 10425645399. Its totient is φ = 9233883744.

The previous prime is 9812685479. The next prime is 9812685499. The reversal of 9812685481 is 1845862189.

It is a happy number.

The square root of 9812685481 is 99059.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7639634025 + 2173051456 = 87405^2 + 46616^2 .

It is not a de Polignac number, because 9812685481 - 2¹ = 9812685479 is a prime.

It is a super-2 number, since 2×9812685481² (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 (9812685581) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1681090 + ... + 1686916.

Almost surely, 2^9812685481 is an apocalyptic number.

9812685481 is the 99059-th square number.

9812685481 is the 49530-th centered octagonal number.

It is an amenable number.

9812685481 is a deficient number, since it is larger than the sum of its proper divisors (612959918).

9812685481 is an frugal number, since it uses more digits than its factorization.

9812685481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11688 (or 5844 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 52.

The cubic root of 9812685481 is about 2140.8979171483.

The spelling of 9812685481 in words is "nine billion, eight hundred twelve million, six hundred eighty-five thousand, four hundred eighty-one".