268178871349 has 2 divisors, whose sum is σ = 268178871350. Its totient is φ = 268178871348.

The previous prime is 268178871329. The next prime is 268178871407. The reversal of 268178871349 is 943178871862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267356214225 + 822657124 = 517065^2 + 28682^2 .

It is a cyclic number.

It is not a de Polignac number, because 268178871349 - 2⁹ = 268178870837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268178871329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134089435674 + 134089435675.

It is an arithmetic number, because the mean of its divisors is an integer number (134089435675).

Almost surely, 2^268178871349 is an apocalyptic number.

It is an amenable number.

268178871349 is a deficient number, since it is larger than the sum of its proper divisors (1).

268178871349 is an equidigital number, since it uses as much as digits as its factorization.

268178871349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32514048, while the sum is 64.

The spelling of 268178871349 in words is "two hundred sixty-eight billion, one hundred seventy-eight million, eight hundred seventy-one thousand, three hundred forty-nine".