55505050000 has 120 divisors (see below), whose sum is σ = 134726580072. Its totient is φ = 22151040000.

The previous prime is 55505049991. The next prime is 55505050021. The reversal of 55505050000 is 5050555.

It can be written as a sum of positive squares in 12 ways, for example, as 55116013824 + 389036176 = 234768^2 + 19724^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27849004 + ... + 27850996.

Almost surely, 2^55505050000 is an apocalyptic number.

55505050000 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 55505050000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67363290036).

55505050000 is an abundant number, since it is smaller than the sum of its proper divisors (79221530072).

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

55505050000 is an equidigital number, since it uses as much as digits as its factorization.

55505050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583 (or 2557 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 25.

The spelling of 55505050000 in words is "fifty-five billion, five hundred five million, fifty thousand".