11999759857 has 2 divisors, whose sum is σ = 11999759858. Its totient is φ = 11999759856.

The previous prime is 11999759851. The next prime is 11999759861. The reversal of 11999759857 is 75895799911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11968578801 + 31181056 = 109401^2 + 5584^2 .

It is a cyclic number.

It is not a de Polignac number, because 11999759857 - 2¹⁹ = 11999235569 is a prime.

It is not a weakly prime, because it can be changed into another prime (11999759851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5999879928 + 5999879929.

It is an arithmetic number, because the mean of its divisors is an integer number (5999879929).

Almost surely, 2^11999759857 is an apocalyptic number.

It is an amenable number.

11999759857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11999759857 is an equidigital number, since it uses as much as digits as its factorization.

11999759857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64297800, while the sum is 70.

The spelling of 11999759857 in words is "eleven billion, nine hundred ninety-nine million, seven hundred fifty-nine thousand, eight hundred fifty-seven".