12400399007797 has 2 divisors, whose sum is σ = 12400399007798. Its totient is φ = 12400399007796.

The previous prime is 12400399007753. The next prime is 12400399007809. The reversal of 12400399007797 is 79770099300421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12394969381201 + 5429626596 = 3520649^2 + 73686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12400399007797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12400399107797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200199503898 + 6200199503899.

It is an arithmetic number, because the mean of its divisors is an integer number (6200199503899).

Almost surely, 2^{12400399007797} is an apocalyptic number.

It is an amenable number.

12400399007797 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400399007797 is an equidigital number, since it uses as much as digits as its factorization.

12400399007797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6001128, while the sum is 58.

The spelling of 12400399007797 in words is "twelve trillion, four hundred billion, three hundred ninety-nine million, seven thousand, seven hundred ninety-seven".