1140780911 has 4 divisors (see below), whose sum is σ = 1141348512. Its totient is φ = 1140213312.

The previous prime is 1140780899. The next prime is 1140780913. The reversal of 1140780911 is 1190870411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1140780911 - 2⁶ = 1140780847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140780913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280775 + ... + 284808.

It is an arithmetic number, because the mean of its divisors is an integer number (285337128).

Almost surely, 2^1140780911 is an apocalyptic number.

1140780911 is a deficient number, since it is larger than the sum of its proper divisors (567601).

1140780911 is an equidigital number, since it uses as much as digits as its factorization.

1140780911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567600.

The product of its (nonzero) digits is 2016, while the sum is 32.

The square root of 1140780911 is about 33775.4483463950. The cubic root of 1140780911 is about 1044.8824027678.

The spelling of 1140780911 in words is "one billion, one hundred forty million, seven hundred eighty thousand, nine hundred eleven".