1868646463687 has 2 divisors, whose sum is σ = 1868646463688. Its totient is φ = 1868646463686.

The previous prime is 1868646463681. The next prime is 1868646463693. The reversal of 1868646463687 is 7863646468681.

It is a balanced prime because it is at equal distance from previous prime (1868646463681) and next prime (1868646463693).

It is an emirp because it is prime and its reverse (7863646468681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1868646463687 - 2³ = 1868646463679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868646463681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934323231843 + 934323231844.

It is an arithmetic number, because the mean of its divisors is an integer number (934323231844).

Almost surely, 2^{1868646463687} is an apocalyptic number.

1868646463687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868646463687 is an equidigital number, since it uses as much as digits as its factorization.

1868646463687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1337720832, while the sum is 73.

The spelling of 1868646463687 in words is "one trillion, eight hundred sixty-eight billion, six hundred forty-six million, four hundred sixty-three thousand, six hundred eighty-seven".