10785741781 has 2 divisors, whose sum is σ = 10785741782. Its totient is φ = 10785741780.

The previous prime is 10785741773. The next prime is 10785741809. The reversal of 10785741781 is 18714758701.

It is a happy number.

10785741781 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., 10578122500 + 207619281 = 102850^2 + 14409^2 .

It is a cyclic number.

It is not a de Polignac number, because 10785741781 - 2³ = 10785741773 is a prime.

It is a super-2 number, since 2×10785741781² (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 (10785741581) 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, 5392870890 + 5392870891.

It is an arithmetic number, because the mean of its divisors is an integer number (5392870891).

Almost surely, 2^10785741781 is an apocalyptic number.

It is an amenable number.

10785741781 is a deficient number, since it is larger than the sum of its proper divisors (1).

10785741781 is an equidigital number, since it uses as much as digits as its factorization.

10785741781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 439040, while the sum is 49.

The spelling of 10785741781 in words is "ten billion, seven hundred eighty-five million, seven hundred forty-one thousand, seven hundred eighty-one".