55505505563 has 8 divisors (see below), whose sum is σ = 60358928832. Its totient is φ = 50828570496.

The previous prime is 55505505511. The next prime is 55505505569. The reversal of 55505505563 is 36550550555.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55505505563 is a prime.

It is a super-2 number, since 2×55505505563² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55505505569) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 44121395 + ... + 44122652.

It is an arithmetic number, because the mean of its divisors is an integer number (7544866104).

Almost surely, 2^55505505563 is an apocalyptic number.

55505505563 is a deficient number, since it is larger than the sum of its proper divisors (4853423269).

55505505563 is a wasteful number, since it uses less digits than its factorization.

55505505563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88244101.

The product of its (nonzero) digits is 1406250, while the sum is 44.

The spelling of 55505505563 in words is "fifty-five billion, five hundred five million, five hundred five thousand, five hundred sixty-three".