55561005555 has 16 divisors (see below), whose sum is σ = 96979209984. Its totient is φ = 26938669280.

The previous prime is 55561005523. The next prime is 55561005559. The reversal of 55561005555 is 55550016555.

It is not a de Polignac number, because 55561005555 - 2⁵ = 55561005523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55561005559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168366519 + ... + 168366848.

It is an arithmetic number, because the mean of its divisors is an integer number (6061200624).

Almost surely, 2^55561005555 is an apocalyptic number.

55561005555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55561005555 is a deficient number, since it is larger than the sum of its proper divisors (41418204429).

55561005555 is a wasteful number, since it uses less digits than its factorization.

55561005555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336733386.

The product of its (nonzero) digits is 468750, while the sum is 42.

It can be divided in two parts, 5556100 and 5555, that added together give a palindrome (5561655).

The spelling of 55561005555 in words is "fifty-five billion, five hundred sixty-one million, five thousand, five hundred fifty-five".