1868851718887 has 2 divisors, whose sum is σ = 1868851718888. Its totient is φ = 1868851718886.

The previous prime is 1868851718869. The next prime is 1868851718897. The reversal of 1868851718887 is 7888171588681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1868851718887 - 2²⁷ = 1868717501159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868851718897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934425859443 + 934425859444.

It is an arithmetic number, because the mean of its divisors is an integer number (934425859444).

Almost surely, 2^{1868851718887} is an apocalyptic number.

1868851718887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868851718887 is an equidigital number, since it uses as much as digits as its factorization.

1868851718887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 385351680, while the sum is 76.

The spelling of 1868851718887 in words is "one trillion, eight hundred sixty-eight billion, eight hundred fifty-one million, seven hundred eighteen thousand, eight hundred eighty-seven".