268684242877 has 2 divisors, whose sum is σ = 268684242878. Its totient is φ = 268684242876.

The previous prime is 268684242847. The next prime is 268684242977. The reversal of 268684242877 is 778242486862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247301322436 + 21382920441 = 497294^2 + 146229^2 .

It is a cyclic number.

It is not a de Polignac number, because 268684242877 - 2²³ = 268675854269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268684242847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134342121438 + 134342121439.

It is an arithmetic number, because the mean of its divisors is an integer number (134342121439).

Almost surely, 2^268684242877 is an apocalyptic number.

It is an amenable number.

268684242877 is a deficient number, since it is larger than the sum of its proper divisors (1).

268684242877 is an equidigital number, since it uses as much as digits as its factorization.

268684242877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115605504, while the sum is 64.

The spelling of 268684242877 in words is "two hundred sixty-eight billion, six hundred eighty-four million, two hundred forty-two thousand, eight hundred seventy-seven".