11856305249 has 2 divisors, whose sum is σ = 11856305250. Its totient is φ = 11856305248.

The previous prime is 11856305221. The next prime is 11856305297. The reversal of 11856305249 is 94250365811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7304779024 + 4551526225 = 85468^2 + 67465^2 .

It is a cyclic number.

It is not a de Polignac number, because 11856305249 - 2²⁴ = 11839528033 is a prime.

It is not a weakly prime, because it can be changed into another prime (11856305449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5928152624 + 5928152625.

It is an arithmetic number, because the mean of its divisors is an integer number (5928152625).

Almost surely, 2^11856305249 is an apocalyptic number.

It is an amenable number.

11856305249 is a deficient number, since it is larger than the sum of its proper divisors (1).

11856305249 is an equidigital number, since it uses as much as digits as its factorization.

11856305249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 11856305249 in words is "eleven billion, eight hundred fifty-six million, three hundred five thousand, two hundred forty-nine".