125812517806 has 8 divisors (see below), whose sum is σ = 188876968704. Its totient is φ = 62853528240.

The previous prime is 125812517711. The next prime is 125812517819. The reversal of 125812517806 is 608715218521.

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

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 26362350 + ... + 26367121.

It is an arithmetic number, because the mean of its divisors is an integer number (23609621088).

Almost surely, 2^125812517806 is an apocalyptic number.

125812517806 is a deficient number, since it is larger than the sum of its proper divisors (63064450898).

125812517806 is a wasteful number, since it uses less digits than its factorization.

125812517806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52730666.

The product of its (nonzero) digits is 268800, while the sum is 46.

The spelling of 125812517806 in words is "one hundred twenty-five billion, eight hundred twelve million, five hundred seventeen thousand, eight hundred six".