505510100055 has 12 divisors (see below), whose sum is σ = 876217506840. Its totient is φ = 269605386672.

The previous prime is 505510099993. The next prime is 505510100111. The reversal of 505510100055 is 550001015505.

505510100055 is a `hidden beast` number, since 5 + 0 + 551 + 0 + 100 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 505510100055 - 2²¹ = 505508002903 is a prime.

It is a super-2 number, since 2×505510100055² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5616778845 + ... + 5616778934.

It is an arithmetic number, because the mean of its divisors is an integer number (73018125570).

Almost surely, 2^505510100055 is an apocalyptic number.

505510100055 is a deficient number, since it is larger than the sum of its proper divisors (370707406785).

505510100055 is a wasteful number, since it uses less digits than its factorization.

505510100055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11233557790 (or 11233557787 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 27.

The spelling of 505510100055 in words is "five hundred five billion, five hundred ten million, one hundred thousand, fifty-five".