12707778546 has 12 divisors (see below), whose sum is σ = 27533520222. Its totient is φ = 4235926176.

The previous prime is 12707778529. The next prime is 12707778547. The reversal of 12707778546 is 64587770721.

12707778546 is a `hidden beast` number, since 1 + 27 + 0 + 7 + 7 + 78 + 546 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9008097921 + 3699680625 = 94911^2 + 60825^2 .

It is a super-2 number, since 2×12707778546² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12707778492 and 12707778501.

It is not an unprimeable number, because it can be changed into a prime (12707778547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 352993831 + ... + 352993866.

Almost surely, 2^12707778546 is an apocalyptic number.

12707778546 is an abundant number, since it is smaller than the sum of its proper divisors (14825741676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12707778546 is a wasteful number, since it uses less digits than its factorization.

12707778546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705987705 (or 705987702 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 54.

The spelling of 12707778546 in words is "twelve billion, seven hundred seven million, seven hundred seventy-eight thousand, five hundred forty-six".