1268895068957 has 2 divisors, whose sum is σ = 1268895068958. Its totient is φ = 1268895068956.

The previous prime is 1268895068941. The next prime is 1268895068977. The reversal of 1268895068957 is 7598605988621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1205404172281 + 63490896676 = 1097909^2 + 251974^2 .

It is a cyclic number.

It is not a de Polignac number, because 1268895068957 - 2⁴ = 1268895068941 is a prime.

It is a super-2 number, since 2×1268895068957² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268895068977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634447534478 + 634447534479.

It is an arithmetic number, because the mean of its divisors is an integer number (634447534479).

Almost surely, 2^{1268895068957} is an apocalyptic number.

It is an amenable number.

1268895068957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268895068957 is an equidigital number, since it uses as much as digits as its factorization.

1268895068957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 522547200, while the sum is 74.

The spelling of 1268895068957 in words is "one trillion, two hundred sixty-eight billion, eight hundred ninety-five million, sixty-eight thousand, nine hundred fifty-seven".