225556188121055 has 16 divisors (see below), whose sum is σ = 295554500777088. Its totient is φ = 163884783300000.

The previous prime is 225556188120979. The next prime is 225556188121073. The reversal of 225556188121055 is 550121881655522.

It is not a de Polignac number, because 225556188121055 - 2¹⁰ = 225556188120031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1950951521 + ... + 1951067130.

It is an arithmetic number, because the mean of its divisors is an integer number (18472156298568).

Almost surely, 2^{225556188121055} is an apocalyptic number.

225556188121055 is a deficient number, since it is larger than the sum of its proper divisors (69998312656033).

225556188121055 is a wasteful number, since it uses less digits than its factorization.

225556188121055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902019718.

The product of its (nonzero) digits is 9600000, while the sum is 56.

The spelling of 225556188121055 in words is "two hundred twenty-five trillion, five hundred fifty-six billion, one hundred eighty-eight million, one hundred twenty-one thousand, fifty-five".