2186871718887 has 48 divisors (see below), whose sum is σ = 3325580399232. Its totient is φ = 1382970032640.

The previous prime is 2186871718781. The next prime is 2186871718897. The reversal of 2186871718887 is 7888171786812.

It is not a de Polignac number, because 2186871718887 - 2¹⁴ = 2186871702503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2186871718897) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20248153 + ... + 20355869.

It is an arithmetic number, because the mean of its divisors is an integer number (69282924984).

Almost surely, 2^{2186871718887} is an apocalyptic number.

2186871718887 is a deficient number, since it is larger than the sum of its proper divisors (1138708680345).

2186871718887 is a wasteful number, since it uses less digits than its factorization.

2186871718887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109288 (or 109285 counting only the distinct ones).

The product of its digits is 134873088, while the sum is 72.

The spelling of 2186871718887 in words is "two trillion, one hundred eighty-six billion, eight hundred seventy-one million, seven hundred eighteen thousand, eight hundred eighty-seven".