268178871861 has 12 divisors (see below), whose sum is σ = 387545347488. Its totient is φ = 178704745704.

The previous prime is 268178871811. The next prime is 268178871871. The reversal of 268178871861 is 168178871862.

It is not a de Polignac number, because 268178871861 - 2⁹ = 268178871349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268178871811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6743145 + ... + 6782798.

It is an arithmetic number, because the mean of its divisors is an integer number (32295445624).

Almost surely, 2^268178871861 is an apocalyptic number.

It is an amenable number.

268178871861 is a deficient number, since it is larger than the sum of its proper divisors (119366475627).

268178871861 is a wasteful number, since it uses less digits than its factorization.

268178871861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13528152 (or 13528149 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 63.

Subtracting from 268178871861 its reverse (168178871862), we obtain a palindrome (99999999999).

The spelling of 268178871861 in words is "two hundred sixty-eight billion, one hundred seventy-eight million, eight hundred seventy-one thousand, eight hundred sixty-one".