125828449249 has 2 divisors, whose sum is σ = 125828449250. Its totient is φ = 125828449248.

The previous prime is 125828449217. The next prime is 125828449273. The reversal of 125828449249 is 942944828521.

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., 123670382224 + 2158067025 = 351668^2 + 46455^2 .

It is an emirp because it is prime and its reverse (942944828521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125828449249 - 2⁵ = 125828449217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125828449193 and 125828449202.

It is not a weakly prime, because it can be changed into another prime (125828449049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62914224624 + 62914224625.

It is an arithmetic number, because the mean of its divisors is an integer number (62914224625).

Almost surely, 2^125828449249 is an apocalyptic number.

It is an amenable number.

125828449249 is a deficient number, since it is larger than the sum of its proper divisors (1).

125828449249 is an equidigital number, since it uses as much as digits as its factorization.

125828449249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13271040, while the sum is 58.

The spelling of 125828449249 in words is "one hundred twenty-five billion, eight hundred twenty-eight million, four hundred forty-nine thousand, two hundred forty-nine".