125756403506 has 8 divisors (see below), whose sum is σ = 190502274924. Its totient is φ = 62255645200.

The previous prime is 125756403497. The next prime is 125756403559. The reversal of 125756403506 is 605304657521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 82050738025 + 43705665481 = 286445^2 + 209059^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311278025 + ... + 311278428.

Almost surely, 2^125756403506 is an apocalyptic number.

125756403506 is a deficient number, since it is larger than the sum of its proper divisors (64745871418).

125756403506 is a wasteful number, since it uses less digits than its factorization.

125756403506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622556556.

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 125756403506 in words is "one hundred twenty-five billion, seven hundred fifty-six million, four hundred three thousand, five hundred six".