125247205655 has 32 divisors (see below), whose sum is σ = 177228959040. Its totient is φ = 83769338880.

The previous prime is 125247205649. The next prime is 125247205673. The reversal of 125247205655 is 556502742521.

It is not a de Polignac number, because 125247205655 - 2¹⁰ = 125247204631 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 133262 + ... + 517931.

It is an arithmetic number, because the mean of its divisors is an integer number (5538404970).

Almost surely, 2^125247205655 is an apocalyptic number.

125247205655 is a deficient number, since it is larger than the sum of its proper divisors (51981753385).

125247205655 is a wasteful number, since it uses less digits than its factorization.

125247205655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651491.

The product of its (nonzero) digits is 840000, while the sum is 44.

The spelling of 125247205655 in words is "one hundred twenty-five billion, two hundred forty-seven million, two hundred five thousand, six hundred fifty-five".