55555555555 has 8 divisors (see below), whose sum is σ = 66669876000. Its totient is φ = 44442304896.

The previous prime is 55555555543. The next prime is 55555555619.

55555555555 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55555555555 - 2²¹ = 55553458403 is a prime.

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

55555555555 is a modest number, since divided by 555555 gives 55555 as remainder.

55555555555 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 a junction number, because it is equal to n+sod(n) for n = 55555555496 and 55555555505.

It is an unprimeable number.

It is a Kaprekar number, because its square (3086419753024691358025) can be partitioned into two parts whose sum is 55555555555.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148375 + ... + 364864.

It is an arithmetic number, because the mean of its divisors is an integer number (8333734500).

Almost surely, 2^55555555555 is an apocalyptic number.

55555555555 is a deficient number, since it is larger than the sum of its proper divisors (11114320445).

55555555555 is a wasteful number, since it uses less digits than its factorization.

55555555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534893.

The product of its digits is 48828125, while the sum is 55.

The spelling of 55555555555 in words is "fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-five".