12078449519 has 2 divisors, whose sum is σ = 12078449520. Its totient is φ = 12078449518.

The previous prime is 12078449507. The next prime is 12078449533. The reversal of 12078449519 is 91594487021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12078449519 - 2⁴ = 12078449503 is a prime.

It is a super-2 number, since 2×12078449519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12078449599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6039224759 + 6039224760.

It is an arithmetic number, because the mean of its divisors is an integer number (6039224760).

Almost surely, 2^12078449519 is an apocalyptic number.

12078449519 is a deficient number, since it is larger than the sum of its proper divisors (1).

12078449519 is an equidigital number, since it uses as much as digits as its factorization.

12078449519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 12078449519 in words is "twelve billion, seventy-eight million, four hundred forty-nine thousand, five hundred nineteen".