555555220129 has 16 divisors (see below), whose sum is σ = 684059504128. Its totient is φ = 439367810112.

The previous prime is 555555220111. The next prime is 555555220159. The reversal of 555555220129 is 921022555555.

It is not a de Polignac number, because 555555220129 - 2⁷ = 555555220001 is a prime.

It is a super-2 number, since 2×555555220129² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (555555220109) 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 15 ways as a sum of consecutive naturals, for example, 1126602 + ... + 1542835.

It is an arithmetic number, because the mean of its divisors is an integer number (42753719008).

Almost surely, 2^555555220129 is an apocalyptic number.

It is an amenable number.

555555220129 is a deficient number, since it is larger than the sum of its proper divisors (128504283999).

555555220129 is a wasteful number, since it uses less digits than its factorization.

555555220129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671744.

The product of its (nonzero) digits is 1125000, while the sum is 46.

The spelling of 555555220129 in words is "five hundred fifty-five billion, five hundred fifty-five million, two hundred twenty thousand, one hundred twenty-nine".