268178871871 has 2 divisors, whose sum is σ = 268178871872. Its totient is φ = 268178871870.

The previous prime is 268178871811. The next prime is 268178871899. The reversal of 268178871871 is 178178871862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268178871871 - 2³⁵ = 233819133503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268178871811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134089435935 + 134089435936.

It is an arithmetic number, because the mean of its divisors is an integer number (134089435936).

Almost surely, 2^268178871871 is an apocalyptic number.

268178871871 is a deficient number, since it is larger than the sum of its proper divisors (1).

268178871871 is an equidigital number, since it uses as much as digits as its factorization.

268178871871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16859136, while the sum is 64.

Subtracting from 268178871871 its reverse (178178871862), we obtain a palindrome (90000000009).

The spelling of 268178871871 in words is "two hundred sixty-eight billion, one hundred seventy-eight million, eight hundred seventy-one thousand, eight hundred seventy-one".