12776758461 has 6 divisors (see below), whose sum is σ = 18455317790. Its totient is φ = 8517838968.

The previous prime is 12776758349. The next prime is 12776758499. The reversal of 12776758461 is 16485767721.

12776758461 is a `hidden beast` number, since 1 + 2 + 77 + 67 + 58 + 461 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7050960900 + 5725797561 = 83970^2 + 75669^2 .

It is not a de Polignac number, because 12776758461 - 2¹¹ = 12776756413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12776758398 and 12776758407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12776758061) 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, 709819906 + ... + 709819923.

Almost surely, 2^12776758461 is an apocalyptic number.

It is an amenable number.

12776758461 is a deficient number, since it is larger than the sum of its proper divisors (5678559329).

12776758461 is a wasteful number, since it uses less digits than its factorization.

12776758461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419639835 (or 1419639832 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The spelling of 12776758461 in words is "twelve billion, seven hundred seventy-six million, seven hundred fifty-eight thousand, four hundred sixty-one".