55555550000 has 120 divisors (see below), whose sum is σ = 135131976000. Its totient is φ = 22124480000.

The previous prime is 55555549997. The next prime is 55555550033. The reversal of 55555550000 is 5555555.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11947676 + ... + 11952324.

It is an arithmetic number, because the mean of its divisors is an integer number (1126099800).

Almost surely, 2^55555550000 is an apocalyptic number.

55555550000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55555550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67565988000).

55555550000 is an abundant number, since it is smaller than the sum of its proper divisors (79576426000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55555550000 is an equidigital number, since it uses as much as digits as its factorization.

55555550000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921 (or 4895 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 35.

55555550000 divided by its reverse (5555555) gives a 4-th power (10000 = 10⁴).

It can be divided in two parts, 5555 and 5550000, that added together give a palindrome (5555555).

The spelling of 55555550000 in words is "fifty-five billion, five hundred fifty-five million, five hundred fifty thousand".