1868568486391 has 2 divisors, whose sum is σ = 1868568486392. Its totient is φ = 1868568486390.

The previous prime is 1868568486361. The next prime is 1868568486401. The reversal of 1868568486391 is 1936848658681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1868568486391 - 2⁵ = 1868568486359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868568486361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934284243195 + 934284243196.

It is an arithmetic number, because the mean of its divisors is an integer number (934284243196).

Almost surely, 2^{1868568486391} is an apocalyptic number.

1868568486391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868568486391 is an equidigital number, since it uses as much as digits as its factorization.

1868568486391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 477757440, while the sum is 73.

The spelling of 1868568486391 in words is "one trillion, eight hundred sixty-eight billion, five hundred sixty-eight million, four hundred eighty-six thousand, three hundred ninety-one".