12780195868705 has 16 divisors (see below), whose sum is σ = 15416816292864. Its totient is φ = 10170437854720.

The previous prime is 12780195868679. The next prime is 12780195868711. The reversal of 12780195868705 is 50786859108721.

12780195868705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12780195868705 - 2³⁹ = 12230440054817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74879394 + ... + 75049876.

It is an arithmetic number, because the mean of its divisors is an integer number (963551018304).

Almost surely, 2^{12780195868705} is an apocalyptic number.

It is an amenable number.

12780195868705 is a deficient number, since it is larger than the sum of its proper divisors (2636620424159).

12780195868705 is a wasteful number, since it uses less digits than its factorization.

12780195868705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249176.

The product of its (nonzero) digits is 67737600, while the sum is 67.

The spelling of 12780195868705 in words is "twelve trillion, seven hundred eighty billion, one hundred ninety-five million, eight hundred sixty-eight thousand, seven hundred five".