125803961887 has 4 divisors (see below), whose sum is σ = 126436142800. Its totient is φ = 125171780976.

The previous prime is 125803961873. The next prime is 125803961893. The reversal of 125803961887 is 788169308521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125803961887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125803961687) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 316090158 + ... + 316090555.

It is an arithmetic number, because the mean of its divisors is an integer number (31609035700).

Almost surely, 2^125803961887 is an apocalyptic number.

125803961887 is a deficient number, since it is larger than the sum of its proper divisors (632180913).

125803961887 is an equidigital number, since it uses as much as digits as its factorization.

125803961887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632180912.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 125803961887 in words is "one hundred twenty-five billion, eight hundred three million, nine hundred sixty-one thousand, eight hundred eighty-seven".