15125681449 has 2 divisors, whose sum is σ = 15125681450. Its totient is φ = 15125681448.

The previous prime is 15125681447. The next prime is 15125681477. The reversal of 15125681449 is 94418652151.

15125681449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12312121600 + 2813559849 = 110960^2 + 53043^2 .

It is a cyclic number.

It is not a de Polignac number, because 15125681449 - 2¹ = 15125681447 is a prime.

Together with 15125681447, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 15125681399 and 15125681408.

It is not a weakly prime, because it can be changed into another prime (15125681447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7562840724 + 7562840725.

It is an arithmetic number, because the mean of its divisors is an integer number (7562840725).

Almost surely, 2^15125681449 is an apocalyptic number.

It is an amenable number.

15125681449 is a deficient number, since it is larger than the sum of its proper divisors (1).

15125681449 is an equidigital number, since it uses as much as digits as its factorization.

15125681449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 46.

The spelling of 15125681449 in words is "fifteen billion, one hundred twenty-five million, six hundred eighty-one thousand, four hundred forty-nine".