12126768752785 has 4 divisors (see below), whose sum is σ = 14552122503348. Its totient is φ = 9701415002224.

The previous prime is 12126768752719. The next prime is 12126768752809. The reversal of 12126768752785 is 58725786762121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2953115082369 + 9173653670416 = 1718463^2 + 3028804^2 .

It is a cyclic number.

It is not a de Polignac number, because 12126768752785 - 2³⁷ = 11989329799313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12126768752785.

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, 1212676875274 + ... + 1212676875283.

It is an arithmetic number, because the mean of its divisors is an integer number (3638030625837).

Almost surely, 2^{12126768752785} is an apocalyptic number.

It is an amenable number.

12126768752785 is a deficient number, since it is larger than the sum of its proper divisors (2425353750563).

12126768752785 is an equidigital number, since it uses as much as digits as its factorization.

12126768752785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425353750562.

The product of its digits is 158054400, while the sum is 67.

The spelling of 12126768752785 in words is "twelve trillion, one hundred twenty-six billion, seven hundred sixty-eight million, seven hundred fifty-two thousand, seven hundred eighty-five".