268463691757 has 2 divisors, whose sum is σ = 268463691758. Its totient is φ = 268463691756.

The previous prime is 268463691703. The next prime is 268463691763. The reversal of 268463691757 is 757196364862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261436893481 + 7026798276 = 511309^2 + 83826^2 .

It is a cyclic number.

It is not a de Polignac number, because 268463691757 - 2³⁵ = 234103953389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268463691557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134231845878 + 134231845879.

It is an arithmetic number, because the mean of its divisors is an integer number (134231845879).

Almost surely, 2^268463691757 is an apocalyptic number.

It is an amenable number.

268463691757 is a deficient number, since it is larger than the sum of its proper divisors (1).

268463691757 is an equidigital number, since it uses as much as digits as its factorization.

268463691757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91445760, while the sum is 64.

The spelling of 268463691757 in words is "two hundred sixty-eight billion, four hundred sixty-three million, six hundred ninety-one thousand, seven hundred fifty-seven".