12445954519 has 2 divisors, whose sum is σ = 12445954520. Its totient is φ = 12445954518.

The previous prime is 12445954517. The next prime is 12445954561. The reversal of 12445954519 is 91545954421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12445954519 - 2¹ = 12445954517 is a prime.

It is a super-2 number, since 2×12445954519² (a number of 21 digits) contains 22 as substring.

Together with 12445954517, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12445954517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6222977259 + 6222977260.

It is an arithmetic number, because the mean of its divisors is an integer number (6222977260).

Almost surely, 2^12445954519 is an apocalyptic number.

12445954519 is a deficient number, since it is larger than the sum of its proper divisors (1).

12445954519 is an equidigital number, since it uses as much as digits as its factorization.

12445954519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296000, while the sum is 49.

The spelling of 12445954519 in words is "twelve billion, four hundred forty-five million, nine hundred fifty-four thousand, five hundred nineteen".