11140755781 has 4 divisors (see below), whose sum is σ = 11182171500. Its totient is φ = 11099340064.

The previous prime is 11140755757. The next prime is 11140755803. The reversal of 11140755781 is 18755704111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18755704111 = 151 ⋅124209961.

It can be written as a sum of positive squares in 2 ways, for example, as 831399556 + 10309356225 = 28834^2 + 101535^2 .

It is a cyclic number.

It is not a de Polignac number, because 11140755781 - 2²³ = 11132367173 is a prime.

It is a super-2 number, since 2×11140755781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11140755721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20707456 + ... + 20707993.

It is an arithmetic number, because the mean of its divisors is an integer number (2795542875).

Almost surely, 2^11140755781 is an apocalyptic number.

It is an amenable number.

11140755781 is a deficient number, since it is larger than the sum of its proper divisors (41415719).

11140755781 is an equidigital number, since it uses as much as digits as its factorization.

11140755781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41415718.

The product of its (nonzero) digits is 39200, while the sum is 40.

The spelling of 11140755781 in words is "eleven billion, one hundred forty million, seven hundred fifty-five thousand, seven hundred eighty-one".