12578033449 has 2 divisors, whose sum is σ = 12578033450. Its totient is φ = 12578033448.

The previous prime is 12578033443. The next prime is 12578033473. The reversal of 12578033449 is 94433087521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12135225600 + 442807849 = 110160^2 + 21043^2 .

It is a cyclic number.

It is not a de Polignac number, because 12578033449 - 2⁵ = 12578033417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12578033399 and 12578033408.

It is not a weakly prime, because it can be changed into another prime (12578033443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6289016724 + 6289016725.

It is an arithmetic number, because the mean of its divisors is an integer number (6289016725).

Almost surely, 2^12578033449 is an apocalyptic number.

It is an amenable number.

12578033449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12578033449 is an equidigital number, since it uses as much as digits as its factorization.

12578033449 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 46.

The spelling of 12578033449 in words is "twelve billion, five hundred seventy-eight million, thirty-three thousand, four hundred forty-nine".