11440740781 has 2 divisors, whose sum is σ = 11440740782. Its totient is φ = 11440740780.

The previous prime is 11440740763. The next prime is 11440740791. The reversal of 11440740781 is 18704704411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9986004900 + 1454735881 = 99930^2 + 38141^2 .

It is a cyclic number.

It is not a de Polignac number, because 11440740781 - 2⁷ = 11440740653 is a prime.

It is a super-2 number, since 2×11440740781² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11440740781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11440740791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5720370390 + 5720370391.

It is an arithmetic number, because the mean of its divisors is an integer number (5720370391).

Almost surely, 2^11440740781 is an apocalyptic number.

It is an amenable number.

11440740781 is a deficient number, since it is larger than the sum of its proper divisors (1).

11440740781 is an equidigital number, since it uses as much as digits as its factorization.

11440740781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 37.

The spelling of 11440740781 in words is "eleven billion, four hundred forty million, seven hundred forty thousand, seven hundred eighty-one".