125319867688 has 8 divisors (see below), whose sum is σ = 234974751930. Its totient is φ = 62659933840.

The previous prime is 125319867683. The next prime is 125319867707. The reversal of 125319867688 is 886768913521.

It can be written as a sum of positive squares in only one way, i.e., 125243794404 + 76073284 = 353898^2 + 8722^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (125319867683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7832491723 + ... + 7832491738.

Almost surely, 2^125319867688 is an apocalyptic number.

It is an amenable number.

125319867688 is a deficient number, since it is larger than the sum of its proper divisors (109654884242).

125319867688 is a wasteful number, since it uses less digits than its factorization.

125319867688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15664983467 (or 15664983463 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 64.

The spelling of 125319867688 in words is "one hundred twenty-five billion, three hundred nineteen million, eight hundred sixty-seven thousand, six hundred eighty-eight".