12578313049 has 2 divisors, whose sum is σ = 12578313050. Its totient is φ = 12578313048.

The previous prime is 12578313029. The next prime is 12578313091. The reversal of 12578313049 is 94031387521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7185613824 + 5392699225 = 84768^2 + 73435^2 .

It is a cyclic number.

It is not a de Polignac number, because 12578313049 - 2⁵ = 12578313017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12578312996 and 12578313014.

It is not a weakly prime, because it can be changed into another prime (12578313029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6289156524 + 6289156525.

It is an arithmetic number, because the mean of its divisors is an integer number (6289156525).

Almost surely, 2^12578313049 is an apocalyptic number.

It is an amenable number.

12578313049 is a deficient number, since it is larger than the sum of its proper divisors (1).

12578313049 is an equidigital number, since it uses as much as digits as its factorization.

12578313049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 12578313049 in words is "twelve billion, five hundred seventy-eight million, three hundred thirteen thousand, forty-nine".