55555588555555 has 16 divisors (see below), whose sum is σ = 72739415397888. Its totient is φ = 40397342476000.

The previous prime is 55555588555529. The next prime is 55555588555603.

55555588555555 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55555588555555 - 2²⁵ = 55555555001123 is a prime.

It is a super-2 number, since 2×55555588555555² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 10.

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, 83690491 + ... + 84351700.

It is an arithmetic number, because the mean of its divisors is an integer number (4546213462368).

Almost surely, 2^{55555588555555} is an apocalyptic number.

55555588555555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55555588555555 is a deficient number, since it is larger than the sum of its proper divisors (17183826842333).

55555588555555 is a wasteful number, since it uses less digits than its factorization.

55555588555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168048218.

The product of its digits is 15625000000, while the sum is 76.

The spelling of 55555588555555 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred eighty-eight million, five hundred fifty-five thousand, five hundred fifty-five".