125555551510203 has 10 divisors (see below), whose sum is σ = 187558292996844. Its totient is φ = 83703701006748.

The previous prime is 125555551510171. The next prime is 125555551510223. The reversal of 125555551510203 is 302015155555521.

125555551510203 is a `hidden beast` number, since 1 + 2 + 5 + 55 + 55 + 515 + 10 + 20 + 3 = 666.

It is not a de Polignac number, because 125555551510203 - 2⁵ = 125555551510171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125555551510223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 775034268501 + ... + 775034268662.

Almost surely, 2^{125555551510203} is an apocalyptic number.

125555551510203 is a deficient number, since it is larger than the sum of its proper divisors (62002741486641).

125555551510203 is an equidigital number, since it uses as much as digits as its factorization.

125555551510203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550068537175 (or 1550068537166 counting only the distinct ones).

The product of its (nonzero) digits is 937500, while the sum is 45.

The spelling of 125555551510203 in words is "one hundred twenty-five trillion, five hundred fifty-five billion, five hundred fifty-one million, five hundred ten thousand, two hundred three".