55505555555 has 8 divisors (see below), whose sum is σ = 66922339344. Its totient is φ = 44193996000.

The previous prime is 55505555537. The next prime is 55505555557. The reversal of 55505555555 is 55555550555.

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

It is not a de Polignac number, because 55505555555 - 2⁶ = 55505555491 is a prime.

It is a Duffinian number.

55505555555 is a modest number, since divided by 555555 gives 55505 as remainder.

It is not an unprimeable number, because it can be changed into a prime (55505555557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26304896 + ... + 26307005.

It is an arithmetic number, because the mean of its divisors is an integer number (8365292418).

Almost surely, 2^55505555555 is an apocalyptic number.

55505555555 is a deficient number, since it is larger than the sum of its proper divisors (11416783789).

55505555555 is a wasteful number, since it uses less digits than its factorization.

55505555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52612117.

The product of its (nonzero) digits is 9765625, while the sum is 50.

Subtracting 55505555555 from its reverse (55555550555), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 55505555555 in words is "fifty-five billion, five hundred five million, five hundred fifty-five thousand, five hundred fifty-five".