2181687287888 has 20 divisors (see below), whose sum is σ = 4227766250880. Its totient is φ = 1090650836064.

The previous prime is 2181687287839. The next prime is 2181687287893. The reversal of 2181687287888 is 8887827861812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11957120 + ... + 12138207.

It is an arithmetic number, because the mean of its divisors is an integer number (211388312544).

Almost surely, 2^{2181687287888} is an apocalyptic number.

It is an amenable number.

2181687287888 is a deficient number, since it is larger than the sum of its proper divisors (2046078962992).

2181687287888 is a wasteful number, since it uses less digits than its factorization.

2181687287888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24100994 (or 24100988 counting only the distinct ones).

The product of its digits is 308281344, while the sum is 74.

The spelling of 2181687287888 in words is "two trillion, one hundred eighty-one billion, six hundred eighty-seven million, two hundred eighty-seven thousand, eight hundred eighty-eight".