125366045549 has 2 divisors, whose sum is σ = 125366045550. Its totient is φ = 125366045548.

The previous prime is 125366045509. The next prime is 125366045557. The reversal of 125366045549 is 945540663521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86211529924 + 39154515625 = 293618^2 + 197875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125366045549 is a prime.

It is a super-2 number, since 2×125366045549² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125366045497 and 125366045506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125366045509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62683022774 + 62683022775.

It is an arithmetic number, because the mean of its divisors is an integer number (62683022775).

Almost surely, 2^125366045549 is an apocalyptic number.

It is an amenable number.

125366045549 is a deficient number, since it is larger than the sum of its proper divisors (1).

125366045549 is an equidigital number, since it uses as much as digits as its factorization.

125366045549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 125366045549 in words is "one hundred twenty-five billion, three hundred sixty-six million, forty-five thousand, five hundred forty-nine".