11564878040851 has 2 divisors, whose sum is σ = 11564878040852. Its totient is φ = 11564878040850.

The previous prime is 11564878040819. The next prime is 11564878040893. The reversal of 11564878040851 is 15804087846511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11564878040851 - 2⁵ = 11564878040819 is a prime.

It is not a weakly prime, because it can be changed into another prime (11564878040351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782439020425 + 5782439020426.

It is an arithmetic number, because the mean of its divisors is an integer number (5782439020426).

Almost surely, 2^{11564878040851} is an apocalyptic number.

11564878040851 is a deficient number, since it is larger than the sum of its proper divisors (1).

11564878040851 is an equidigital number, since it uses as much as digits as its factorization.

11564878040851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8601600, while the sum is 58.

The spelling of 11564878040851 in words is "eleven trillion, five hundred sixty-four billion, eight hundred seventy-eight million, forty thousand, eight hundred fifty-one".