13445431320413 has 2 divisors, whose sum is σ = 13445431320414. Its totient is φ = 13445431320412.

The previous prime is 13445431320383. The next prime is 13445431320463. The reversal of 13445431320413 is 31402313454431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11614613952484 + 1830817367929 = 3408022^2 + 1353077^2 .

It is a cyclic number.

It is not a de Polignac number, because 13445431320413 - 2¹⁰ = 13445431319389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13445431320463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6722715660206 + 6722715660207.

It is an arithmetic number, because the mean of its divisors is an integer number (6722715660207).

Almost surely, 2^{13445431320413} is an apocalyptic number.

It is an amenable number.

13445431320413 is a deficient number, since it is larger than the sum of its proper divisors (1).

13445431320413 is an equidigital number, since it uses as much as digits as its factorization.

13445431320413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 13445431320413 its reverse (31402313454431), we get a palindrome (44847744774844).

The spelling of 13445431320413 in words is "thirteen trillion, four hundred forty-five billion, four hundred thirty-one million, three hundred twenty thousand, four hundred thirteen".