12558952649 has 2 divisors, whose sum is σ = 12558952650. Its totient is φ = 12558952648.

The previous prime is 12558952561. The next prime is 12558952669. The reversal of 12558952649 is 94625985521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8881743049 + 3677209600 = 94243^2 + 60640^2 .

It is a cyclic number.

It is not a de Polignac number, because 12558952649 - 2¹⁶ = 12558887113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12558952594 and 12558952603.

It is not a weakly prime, because it can be changed into another prime (12558952669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6279476324 + 6279476325.

It is an arithmetic number, because the mean of its divisors is an integer number (6279476325).

Almost surely, 2^12558952649 is an apocalyptic number.

It is an amenable number.

12558952649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12558952649 is an equidigital number, since it uses as much as digits as its factorization.

12558952649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776000, while the sum is 56.

The spelling of 12558952649 in words is "twelve billion, five hundred fifty-eight million, nine hundred fifty-two thousand, six hundred forty-nine".