12549116125649 has 2 divisors, whose sum is σ = 12549116125650. Its totient is φ = 12549116125648.

The previous prime is 12549116125621. The next prime is 12549116125661. The reversal of 12549116125649 is 94652161194521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11814735684049 + 734380441600 = 3437257^2 + 856960^2 .

It is a cyclic number.

It is not a de Polignac number, because 12549116125649 - 2⁸ = 12549116125393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12549116125594 and 12549116125603.

It is not a weakly prime, because it can be changed into another prime (12549116125699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6274558062824 + 6274558062825.

It is an arithmetic number, because the mean of its divisors is an integer number (6274558062825).

Almost surely, 2^{12549116125649} is an apocalyptic number.

It is an amenable number.

12549116125649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12549116125649 is an equidigital number, since it uses as much as digits as its factorization.

12549116125649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 56.

The spelling of 12549116125649 in words is "twelve trillion, five hundred forty-nine billion, one hundred sixteen million, one hundred twenty-five thousand, six hundred forty-nine".