12776758449 has 48 divisors (see below), whose sum is σ = 22191897600. Its totient is φ = 6384650688.

The previous prime is 12776758349. The next prime is 12776758499. The reversal of 12776758449 is 94485767721.

It is not a de Polignac number, because 12776758449 - 2¹¹ = 12776756401 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12776758392 and 12776758401.

It is not an unprimeable number, because it can be changed into a prime (12776758499) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27309 + ... + 162170.

It is an arithmetic number, because the mean of its divisors is an integer number (462331200).

Almost surely, 2^12776758449 is an apocalyptic number.

12776758449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12776758449 is a deficient number, since it is larger than the sum of its proper divisors (9415139151).

12776758449 is a wasteful number, since it uses less digits than its factorization.

12776758449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189534 (or 189521 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 60.

The spelling of 12776758449 in words is "twelve billion, seven hundred seventy-six million, seven hundred fifty-eight thousand, four hundred forty-nine".