55305505503 has 6 divisors (see below), whose sum is σ = 79885730184. Its totient is φ = 36870336996.

The previous prime is 55305505471. The next prime is 55305505511. The reversal of 55305505503 is 30550550355.

55305505503 is a `hidden beast` number, since 5 + 53 + 0 + 5 + 50 + 550 + 3 = 666.

It is not a de Polignac number, because 55305505503 - 2⁵ = 55305505471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55305505543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3072528075 + ... + 3072528092.

It is an arithmetic number, because the mean of its divisors is an integer number (13314288364).

Almost surely, 2^55305505503 is an apocalyptic number.

55305505503 is a deficient number, since it is larger than the sum of its proper divisors (24580224681).

55305505503 is a wasteful number, since it uses less digits than its factorization.

55305505503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145056173 (or 6145056170 counting only the distinct ones).

The product of its (nonzero) digits is 140625, while the sum is 36.

The spelling of 55305505503 in words is "fifty-five billion, three hundred five million, five hundred five thousand, five hundred three".