125535552503 has 4 divisors (see below), whose sum is σ = 125706815928. Its totient is φ = 125364289080.

The previous prime is 125535552487. The next prime is 125535552529. The reversal of 125535552503 is 305255535521.

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

It is a cyclic number.

It is not a de Polignac number, because 125535552503 - 2⁴ = 125535552487 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 (125535554503) by changing a digit.

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, 85630613 + ... + 85632078.

It is an arithmetic number, because the mean of its divisors is an integer number (31426703982).

Almost surely, 2^125535552503 is an apocalyptic number.

125535552503 is a deficient number, since it is larger than the sum of its proper divisors (171263425).

125535552503 is an equidigital number, since it uses as much as digits as its factorization.

125535552503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171263424.

The product of its (nonzero) digits is 562500, while the sum is 41.

The spelling of 125535552503 in words is "one hundred twenty-five billion, five hundred thirty-five million, five hundred fifty-two thousand, five hundred three".