1868640913687 has 8 divisors (see below), whose sum is σ = 2000329257600. Its totient is φ = 1740286452024.

The previous prime is 1868640913669. The next prime is 1868640913703. The reversal of 1868640913687 is 7863190468681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1868640913687 - 2¹⁵ = 1868640880919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868640913387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833469403 + ... + 833471644.

It is an arithmetic number, because the mean of its divisors is an integer number (250041157200).

Almost surely, 2^{1868640913687} is an apocalyptic number.

1868640913687 is a deficient number, since it is larger than the sum of its proper divisors (131688343913).

1868640913687 is a wasteful number, since it uses less digits than its factorization.

1868640913687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666941125.

The product of its (nonzero) digits is 83607552, while the sum is 67.

The spelling of 1868640913687 in words is "one trillion, eight hundred sixty-eight billion, six hundred forty million, nine hundred thirteen thousand, six hundred eighty-seven".