12677251681 has 2 divisors, whose sum is σ = 12677251682. Its totient is φ = 12677251680.

The previous prime is 12677251663. The next prime is 12677251733. The reversal of 12677251681 is 18615277621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12676733281 + 518400 = 112591^2 + 720^2 .

It is an emirp because it is prime and its reverse (18615277621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12677251681 - 2¹¹ = 12677249633 is a prime.

It is a super-3 number, since 3×12677251681³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (12677252681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6338625840 + 6338625841.

It is an arithmetic number, because the mean of its divisors is an integer number (6338625841).

Almost surely, 2^12677251681 is an apocalyptic number.

It is an amenable number.

12677251681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12677251681 is an equidigital number, since it uses as much as digits as its factorization.

12677251681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 46.

The spelling of 12677251681 in words is "twelve billion, six hundred seventy-seven million, two hundred fifty-one thousand, six hundred eighty-one".