125531012505 has 64 divisors (see below), whose sum is σ = 212278809600. Its totient is φ = 63169424640.

The previous prime is 125531012483. The next prime is 125531012513. The reversal of 125531012505 is 505210135521.

It is not a de Polignac number, because 125531012505 - 2⁷ = 125531012377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 123189886 + ... + 123190904.

It is an arithmetic number, because the mean of its divisors is an integer number (3316856400).

Almost surely, 2^125531012505 is an apocalyptic number.

125531012505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125531012505 is a deficient number, since it is larger than the sum of its proper divisors (86747797095).

125531012505 is a wasteful number, since it uses less digits than its factorization.

125531012505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374.

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 125531012505 in words is "one hundred twenty-five billion, five hundred thirty-one million, twelve thousand, five hundred five".