1285716868571 has 2 divisors, whose sum is σ = 1285716868572. Its totient is φ = 1285716868570.

The previous prime is 1285716868559. The next prime is 1285716868577. The reversal of 1285716868571 is 1758686175821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285716868571 is a prime.

It is a super-2 number, since 2×1285716868571² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1285716868498 and 1285716868507.

It is not a weakly prime, because it can be changed into another prime (1285716868577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642858434285 + 642858434286.

It is an arithmetic number, because the mean of its divisors is an integer number (642858434286).

Almost surely, 2^{1285716868571} is an apocalyptic number.

1285716868571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285716868571 is an equidigital number, since it uses as much as digits as its factorization.

1285716868571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45158400, while the sum is 65.

The spelling of 1285716868571 in words is "one trillion, two hundred eighty-five billion, seven hundred sixteen million, eight hundred sixty-eight thousand, five hundred seventy-one".