125530820686 has 4 divisors (see below), whose sum is σ = 188296231032. Its totient is φ = 62765410342.

The previous prime is 125530820677. The next prime is 125530820699. The reversal of 125530820686 is 686028035521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 686028035521 = 181 ⋅3790210141.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31382705170 + ... + 31382705173.

It is an arithmetic number, because the mean of its divisors is an integer number (47074057758).

Almost surely, 2^125530820686 is an apocalyptic number.

125530820686 is a deficient number, since it is larger than the sum of its proper divisors (62765410346).

125530820686 is an equidigital number, since it uses as much as digits as its factorization.

125530820686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62765410345.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 125530820686 in words is "one hundred twenty-five billion, five hundred thirty million, eight hundred twenty thousand, six hundred eighty-six".