125828449217 has 2 divisors, whose sum is σ = 125828449218. Its totient is φ = 125828449216.

The previous prime is 125828449163. The next prime is 125828449249. The reversal of 125828449217 is 712944828521.

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., 124467134401 + 1361314816 = 352799^2 + 36896^2 .

It is a cyclic number.

It is not a de Polignac number, because 125828449217 - 2¹² = 125828445121 is a prime.

It is not a weakly prime, because it can be changed into another prime (125828449717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62914224608 + 62914224609.

It is an arithmetic number, because the mean of its divisors is an integer number (62914224609).

Almost surely, 2^125828449217 is an apocalyptic number.

It is an amenable number.

125828449217 is a deficient number, since it is larger than the sum of its proper divisors (1).

125828449217 is an equidigital number, since it uses as much as digits as its factorization.

125828449217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 53.

The spelling of 125828449217 in words is "one hundred twenty-five billion, eight hundred twenty-eight million, four hundred forty-nine thousand, two hundred seventeen".