12405664436519 has 2 divisors, whose sum is σ = 12405664436520. Its totient is φ = 12405664436518.

The previous prime is 12405664436491. The next prime is 12405664436533. The reversal of 12405664436519 is 91563446650421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12405664436519 is a prime.

It is a super-2 number, since 2×12405664436519² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12405664436579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6202832218259 + 6202832218260.

It is an arithmetic number, because the mean of its divisors is an integer number (6202832218260).

Almost surely, 2^{12405664436519} is an apocalyptic number.

12405664436519 is a deficient number, since it is larger than the sum of its proper divisors (1).

12405664436519 is an equidigital number, since it uses as much as digits as its factorization.

12405664436519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18662400, while the sum is 56.

The spelling of 12405664436519 in words is "twelve trillion, four hundred five billion, six hundred sixty-four million, four hundred thirty-six thousand, five hundred nineteen".