12438034561 has 2 divisors, whose sum is σ = 12438034562. Its totient is φ = 12438034560.

The previous prime is 12438034537. The next prime is 12438034597. The reversal of 12438034561 is 16543083421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9450756225 + 2987278336 = 97215^2 + 54656^2 .

It is a cyclic number.

It is not a de Polignac number, because 12438034561 - 2¹⁹ = 12437510273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12438034561.

It is not a weakly prime, because it can be changed into another prime (12438037561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6219017280 + 6219017281.

It is an arithmetic number, because the mean of its divisors is an integer number (6219017281).

Almost surely, 2^12438034561 is an apocalyptic number.

It is an amenable number.

12438034561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12438034561 is an equidigital number, since it uses as much as digits as its factorization.

12438034561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 12438034561 in words is "twelve billion, four hundred thirty-eight million, thirty-four thousand, five hundred sixty-one".