555555555555555 has 128 divisors (see below), whose sum is σ = 968908644974592. Its totient is φ = 271179601920000.

The previous prime is 555555555555529. The next prime is 555555555555557.

555555555555555 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 555555555555555 - 2⁹ = 555555555555043 is a prime.

It is a nude number because it is divisible by every one of its digits.

555555555555555 is a modest number, since divided by 55555555 gives 5555555 as remainder.

555555555555555 is a nontrivial repdigit in base 10.

It is a plaindrome in base 10.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (555555555555557) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 189711675 + ... + 192617835.

It is an arithmetic number, because the mean of its divisors is an integer number (7569598788864).

Almost surely, 2^{555555555555555} is an apocalyptic number.

555555555555555 is a deficient number, since it is larger than the sum of its proper divisors (413353089419037).

555555555555555 is a wasteful number, since it uses less digits than its factorization.

555555555555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906549.

The product of its digits is 30517578125, while the sum is 75.

The spelling of 555555555555555 in words is "five hundred fifty-five trillion, five hundred fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-five".