12923449806461 has 2 divisors, whose sum is σ = 12923449806462. Its totient is φ = 12923449806460.

The previous prime is 12923449806451. The next prime is 12923449806523. The reversal of 12923449806461 is 16460894432921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7003401203236 + 5920048603225 = 2646394^2 + 2433115^2 .

It is a cyclic number.

It is not a de Polignac number, because 12923449806461 - 2¹⁴ = 12923449790077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12923449806461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12923449806451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6461724903230 + 6461724903231.

It is an arithmetic number, because the mean of its divisors is an integer number (6461724903231).

Almost surely, 2^{12923449806461} is an apocalyptic number.

It is an amenable number.

12923449806461 is a deficient number, since it is larger than the sum of its proper divisors (1).

12923449806461 is an equidigital number, since it uses as much as digits as its factorization.

12923449806461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17915904, while the sum is 59.

The spelling of 12923449806461 in words is "twelve trillion, nine hundred twenty-three billion, four hundred forty-nine million, eight hundred six thousand, four hundred sixty-one".