125138258657 has 2 divisors, whose sum is σ = 125138258658. Its totient is φ = 125138258656.

The previous prime is 125138258647. The next prime is 125138258741. The reversal of 125138258657 is 756852831521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89171515456 + 35966743201 = 298616^2 + 189649^2 .

It is a cyclic number.

It is not a de Polignac number, because 125138258657 - 2¹² = 125138254561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125138258599 and 125138258608.

It is not a weakly prime, because it can be changed into another prime (125138258617) 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, 62569129328 + 62569129329.

It is an arithmetic number, because the mean of its divisors is an integer number (62569129329).

Almost surely, 2^125138258657 is an apocalyptic number.

It is an amenable number.

125138258657 is a deficient number, since it is larger than the sum of its proper divisors (1).

125138258657 is an equidigital number, since it uses as much as digits as its factorization.

125138258657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032000, while the sum is 53.

The spelling of 125138258657 in words is "one hundred twenty-five billion, one hundred thirty-eight million, two hundred fifty-eight thousand, six hundred fifty-seven".