55555555555555 has 32 divisors (see below), whose sum is σ = 73047360384000. Its totient is φ = 40226287046400.

The previous prime is 55555555555541. The next prime is 55555555555573.

55555555555555 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55555555555555 - 2⁷ = 55555555555427 is a prime.

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

55555555555555 is a modest number, since divided by 55555555 gives 555555 as remainder.

55555555555555 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 an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60656560 + ... + 61565650.

It is an arithmetic number, because the mean of its divisors is an integer number (2282730012000).

Almost surely, 2^{55555555555555} is an apocalyptic number.

55555555555555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55555555555555 is a deficient number, since it is larger than the sum of its proper divisors (17491804828445).

55555555555555 is a wasteful number, since it uses less digits than its factorization.

55555555555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913995.

The product of its digits is 6103515625, while the sum is 70.

The spelling of 55555555555555 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-five".