125864072689 has 8 divisors (see below), whose sum is σ = 126397846440. Its totient is φ = 125330787456.

The previous prime is 125864072669. The next prime is 125864072699. The reversal of 125864072689 is 986270468521.

It can be written as a sum of positive squares in 4 ways, for example, as 1895296225 + 123968776464 = 43535^2 + 352092^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125864072689 - 2⁹ = 125864072177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125864072629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398949 + ... + 641005.

It is an arithmetic number, because the mean of its divisors is an integer number (15799730805).

Almost surely, 2^125864072689 is an apocalyptic number.

It is an amenable number.

125864072689 is a deficient number, since it is larger than the sum of its proper divisors (533773751).

125864072689 is a wasteful number, since it uses less digits than its factorization.

125864072689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244259.

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 125864072689 in words is "one hundred twenty-five billion, eight hundred sixty-four million, seventy-two thousand, six hundred eighty-nine".