2112780416687 has 4 divisors (see below), whose sum is σ = 2133699034776. Its totient is φ = 2091861798600.

The previous prime is 2112780416627. The next prime is 2112780416699. The reversal of 2112780416687 is 7866140872112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2112780416687 - 2⁸ = 2112780416431 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 (2112780416627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10459308893 + ... + 10459309094.

It is an arithmetic number, because the mean of its divisors is an integer number (533424758694).

Almost surely, 2^{2112780416687} is an apocalyptic number.

2112780416687 is a deficient number, since it is larger than the sum of its proper divisors (20918618089).

2112780416687 is a wasteful number, since it uses less digits than its factorization.

2112780416687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20918618088.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 2112780416687 in words is "two trillion, one hundred twelve billion, seven hundred eighty million, four hundred sixteen thousand, six hundred eighty-seven".