505550552805 has 24 divisors (see below), whose sum is σ = 879087290328. Its totient is φ = 268765526016.

The previous prime is 505550552729. The next prime is 505550552831. The reversal of 505550552805 is 508255055505.

It can be written as a sum of positive squares in 4 ways, for example, as 29309782401 + 476240770404 = 171201^2 + 690102^2 .

It is not a de Polignac number, because 505550552805 - 2⁷ = 505550552677 is a prime.

It is a super-2 number, since 2×505550552805² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 17932332 + ... + 17960501.

It is an arithmetic number, because the mean of its divisors is an integer number (36628637097).

Almost surely, 2^505550552805 is an apocalyptic number.

It is an amenable number.

505550552805 is a deficient number, since it is larger than the sum of its proper divisors (373536737523).

505550552805 is a wasteful number, since it uses less digits than its factorization.

505550552805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35893157 (or 35893154 counting only the distinct ones).

The product of its (nonzero) digits is 1250000, while the sum is 45.

The spelling of 505550552805 in words is "five hundred five billion, five hundred fifty million, five hundred fifty-two thousand, eight hundred five".