1268858909287 has 2 divisors, whose sum is σ = 1268858909288. Its totient is φ = 1268858909286.

The previous prime is 1268858909161. The next prime is 1268858909291. The reversal of 1268858909287 is 7829098588621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1268858909287 is a prime.

It is a super-2 number, since 2×1268858909287² (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 (1268859909287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634429454643 + 634429454644.

It is an arithmetic number, because the mean of its divisors is an integer number (634429454644).

Almost surely, 2^{1268858909287} is an apocalyptic number.

1268858909287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268858909287 is an equidigital number, since it uses as much as digits as its factorization.

1268858909287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 278691840, while the sum is 73.

The spelling of 1268858909287 in words is "one trillion, two hundred sixty-eight billion, eight hundred fifty-eight million, nine hundred nine thousand, two hundred eighty-seven".