12774424561 has 2 divisors, whose sum is σ = 12774424562. Its totient is φ = 12774424560.

The previous prime is 12774424547. The next prime is 12774424577. The reversal of 12774424561 is 16542447721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8585875600 + 4188548961 = 92660^2 + 64719^2 .

It is a cyclic number.

It is not a de Polignac number, because 12774424561 - 2³¹ = 10626940913 is a prime.

It is not a weakly prime, because it can be changed into another prime (12774424591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6387212280 + 6387212281.

It is an arithmetic number, because the mean of its divisors is an integer number (6387212281).

Almost surely, 2^12774424561 is an apocalyptic number.

It is an amenable number.

12774424561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12774424561 is an equidigital number, since it uses as much as digits as its factorization.

12774424561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 43.

The spelling of 12774424561 in words is "twelve billion, seven hundred seventy-four million, four hundred twenty-four thousand, five hundred sixty-one".