9216680581 has 2 divisors, whose sum is σ = 9216680582. Its totient is φ = 9216680580.

The previous prime is 9216680573. The next prime is 9216680659. The reversal of 9216680581 is 1850866129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7844644900 + 1372035681 = 88570^2 + 37041^2 .

It is a cyclic number.

It is not a de Polignac number, because 9216680581 - 2³ = 9216680573 is a prime.

It is a super-2 number, since 2×9216680581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9216680521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4608340290 + 4608340291.

It is an arithmetic number, because the mean of its divisors is an integer number (4608340291).

Almost surely, 2^9216680581 is an apocalyptic number.

It is an amenable number.

9216680581 is a deficient number, since it is larger than the sum of its proper divisors (1).

9216680581 is an equidigital number, since it uses as much as digits as its factorization.

9216680581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 9216680581 is about 96003.5446272688. The cubic root of 9216680581 is about 2096.6447236685.

The spelling of 9216680581 in words is "nine billion, two hundred sixteen million, six hundred eighty thousand, five hundred eighty-one".