55505055055503 has 64 divisors (see below), whose sum is σ = 81353691619200. Its totient is φ = 33504886947840.

The previous prime is 55505055055501. The next prime is 55505055055511. The reversal of 55505055055503 is 30555055050555.

It is not a de Polignac number, because 55505055055503 - 2¹ = 55505055055501 is a prime.

It is a super-2 number, since 2×55505055055503² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505055055501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3765344713 + ... + 3765359453.

It is an arithmetic number, because the mean of its divisors is an integer number (1271151431550).

Almost surely, 2^{55505055055503} is an apocalyptic number.

55505055055503 is a deficient number, since it is larger than the sum of its proper divisors (25848636563697).

55505055055503 is a wasteful number, since it uses less digits than its factorization.

55505055055503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23772.

The product of its (nonzero) digits is 5859375, while the sum is 48.

The spelling of 55505055055503 in words is "fifty-five trillion, five hundred five billion, fifty-five million, fifty-five thousand, five hundred three".