11560783891 has 2 divisors, whose sum is σ = 11560783892. Its totient is φ = 11560783890.

The previous prime is 11560783879. The next prime is 11560783931. The reversal of 11560783891 is 19838706511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11560783891 - 2⁷ = 11560783763 is a prime.

It is not a weakly prime, because it can be changed into another prime (11560783991) 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 as a sum of consecutive naturals, namely, 5780391945 + 5780391946.

It is an arithmetic number, because the mean of its divisors is an integer number (5780391946).

Almost surely, 2^11560783891 is an apocalyptic number.

11560783891 is a deficient number, since it is larger than the sum of its proper divisors (1).

11560783891 is an equidigital number, since it uses as much as digits as its factorization.

11560783891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 49.

The spelling of 11560783891 in words is "eleven billion, five hundred sixty million, seven hundred eighty-three thousand, eight hundred ninety-one".