9116452781 has 2 divisors, whose sum is σ = 9116452782. Its totient is φ = 9116452780.

The previous prime is 9116452769. The next prime is 9116452801. The reversal of 9116452781 is 1872546119.

9116452781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8985144100 + 131308681 = 94790^2 + 11459^2 .

It is a cyclic number.

It is not a de Polignac number, because 9116452781 - 2²⁶ = 9049343917 is a prime.

It is a super-2 number, since 2×9116452781² (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 (9116452721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4558226390 + 4558226391.

It is an arithmetic number, because the mean of its divisors is an integer number (4558226391).

Almost surely, 2^9116452781 is an apocalyptic number.

It is an amenable number.

9116452781 is a deficient number, since it is larger than the sum of its proper divisors (1).

9116452781 is an equidigital number, since it uses as much as digits as its factorization.

9116452781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 44.

The square root of 9116452781 is about 95480.1172024836. The cubic root of 9116452781 is about 2089.0169427296.

The spelling of 9116452781 in words is "nine billion, one hundred sixteen million, four hundred fifty-two thousand, seven hundred eighty-one".