55555005550 has 48 divisors (see below), whose sum is σ = 113760464400. Its totient is φ = 20016460800.

The previous prime is 55555005511. The next prime is 55555005587. The reversal of 55555005550 is 5550055555.

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, 403395 + ... + 523294.

It is an arithmetic number, because the mean of its divisors is an integer number (2370009675).

Almost surely, 2^55555005550 is an apocalyptic number.

55555005550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55555005550 is an abundant number, since it is smaller than the sum of its proper divisors (58205458850).

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

55555005550 is a wasteful number, since it uses less digits than its factorization.

55555005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926821 (or 926816 counting only the distinct ones).

The product of its (nonzero) digits is 390625, while the sum is 40.

It can be divided in two parts, 55555005 and 550, that added together give a palindrome (55555555).

The spelling of 55555005550 in words is "fifty-five billion, five hundred fifty-five million, five thousand, five hundred fifty".