125728913839 has 4 divisors (see below), whose sum is σ = 126254976480. Its totient is φ = 125202851200.

The previous prime is 125728913789. The next prime is 125728913867. The reversal of 125728913839 is 938319827521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125728913839 - 2¹⁹ = 125728389551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125728913879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263030962 + ... + 263031439.

It is an arithmetic number, because the mean of its divisors is an integer number (31563744120).

Almost surely, 2^125728913839 is an apocalyptic number.

125728913839 is a deficient number, since it is larger than the sum of its proper divisors (526062641).

125728913839 is an equidigital number, since it uses as much as digits as its factorization.

125728913839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526062640.

The product of its digits is 6531840, while the sum is 58.

The spelling of 125728913839 in words is "one hundred twenty-five billion, seven hundred twenty-eight million, nine hundred thirteen thousand, eight hundred thirty-nine".