125567198728 has 32 divisors (see below), whose sum is σ = 239298040800. Its totient is φ = 61760883328.

The previous prime is 125567198717. The next prime is 125567198747. The reversal of 125567198728 is 827891765521.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 251098 + ... + 560521.

It is an arithmetic number, because the mean of its divisors is an integer number (7478063775).

Almost surely, 2^125567198728 is an apocalyptic number.

It is an amenable number.

125567198728 is a deficient number, since it is larger than the sum of its proper divisors (113730842072).

125567198728 is a wasteful number, since it uses less digits than its factorization.

125567198728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811941 (or 811937 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 61.

The spelling of 125567198728 in words is "one hundred twenty-five billion, five hundred sixty-seven million, one hundred ninety-eight thousand, seven hundred twenty-eight".