11560783921 has 4 divisors (see below), whose sum is σ = 12240830052. Its totient is φ = 10880737792.

The previous prime is 11560783891. The next prime is 11560783931. The reversal of 11560783921 is 12938706511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7112560896 + 4448223025 = 84336^2 + 66695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11560783921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11560783931) 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, 340023040 + ... + 340023073.

It is an arithmetic number, because the mean of its divisors is an integer number (3060207513).

Almost surely, 2^11560783921 is an apocalyptic number.

It is an amenable number.

11560783921 is a deficient number, since it is larger than the sum of its proper divisors (680046131).

11560783921 is an equidigital number, since it uses as much as digits as its factorization.

11560783921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680046130.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 11560783921 in words is "eleven billion, five hundred sixty million, seven hundred eighty-three thousand, nine hundred twenty-one".