10816305581 has 2 divisors, whose sum is σ = 10816305582. Its totient is φ = 10816305580.

The previous prime is 10816305517. The next prime is 10816305583. The reversal of 10816305581 is 18550361801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6898797481 + 3917508100 = 83059^2 + 62590^2 .

It is a cyclic number.

It is not a de Polignac number, because 10816305581 - 2⁶ = 10816305517 is a prime.

It is a super-2 number, since 2×10816305581² (a number of 21 digits) contains 22 as substring.

Together with 10816305583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10816305583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5408152790 + 5408152791.

It is an arithmetic number, because the mean of its divisors is an integer number (5408152791).

Almost surely, 2^10816305581 is an apocalyptic number.

It is an amenable number.

10816305581 is a deficient number, since it is larger than the sum of its proper divisors (1).

10816305581 is an equidigital number, since it uses as much as digits as its factorization.

10816305581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 38.

The spelling of 10816305581 in words is "ten billion, eight hundred sixteen million, three hundred five thousand, five hundred eighty-one".