11718287857 has 2 divisors, whose sum is σ = 11718287858. Its totient is φ = 11718287856.

The previous prime is 11718287837. The next prime is 11718287881. The reversal of 11718287857 is 75878281711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11247875136 + 470412721 = 106056^2 + 21689^2 .

It is a cyclic number.

It is not a de Polignac number, because 11718287857 - 2⁷ = 11718287729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11718287798 and 11718287807.

It is not a weakly prime, because it can be changed into another prime (11718287837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5859143928 + 5859143929.

It is an arithmetic number, because the mean of its divisors is an integer number (5859143929).

Almost surely, 2^11718287857 is an apocalyptic number.

It is an amenable number.

11718287857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11718287857 is an equidigital number, since it uses as much as digits as its factorization.

11718287857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1756160, while the sum is 55.

The spelling of 11718287857 in words is "eleven billion, seven hundred eighteen million, two hundred eighty-seven thousand, eight hundred fifty-seven".