11681784859 has 2 divisors, whose sum is σ = 11681784860. Its totient is φ = 11681784858.

The previous prime is 11681784853. The next prime is 11681784943. The reversal of 11681784859 is 95848718611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11681784859 - 2⁹ = 11681784347 is a prime.

It is not a weakly prime, because it can be changed into another prime (11681784853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5840892429 + 5840892430.

It is an arithmetic number, because the mean of its divisors is an integer number (5840892430).

Almost surely, 2^11681784859 is an apocalyptic number.

11681784859 is a deficient number, since it is larger than the sum of its proper divisors (1).

11681784859 is an equidigital number, since it uses as much as digits as its factorization.

11681784859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 58.

The spelling of 11681784859 in words is "eleven billion, six hundred eighty-one million, seven hundred eighty-four thousand, eight hundred fifty-nine".