1868851718885 has 16 divisors (see below), whose sum is σ = 2244430847232. Its totient is φ = 1493875800000.

The previous prime is 1868851718869. The next prime is 1868851718887. The reversal of 1868851718885 is 5888171588681.

It is not a de Polignac number, because 1868851718885 - 2⁴ = 1868851718869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868851718887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83045135 + ... + 83067635.

It is an arithmetic number, because the mean of its divisors is an integer number (140276927952).

Almost surely, 2^{1868851718885} is an apocalyptic number.

It is an amenable number.

1868851718885 is a deficient number, since it is larger than the sum of its proper divisors (375579128347).

1868851718885 is a wasteful number, since it uses less digits than its factorization.

1868851718885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35164.

The product of its digits is 275251200, while the sum is 74.

The spelling of 1868851718885 in words is "one trillion, eight hundred sixty-eight billion, eight hundred fifty-one million, seven hundred eighteen thousand, eight hundred eighty-five".