268742557439 has 2 divisors, whose sum is σ = 268742557440. Its totient is φ = 268742557438.

The previous prime is 268742557417. The next prime is 268742557493. The reversal of 268742557439 is 934755247862.

Together with next prime (268742557493) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268742557439 - 2¹⁶ = 268742491903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268742557339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134371278719 + 134371278720.

It is an arithmetic number, because the mean of its divisors is an integer number (134371278720).

Almost surely, 2^268742557439 is an apocalyptic number.

268742557439 is a deficient number, since it is larger than the sum of its proper divisors (1).

268742557439 is an equidigital number, since it uses as much as digits as its factorization.

268742557439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 101606400, while the sum is 62.

The spelling of 268742557439 in words is "two hundred sixty-eight billion, seven hundred forty-two million, five hundred fifty-seven thousand, four hundred thirty-nine".