505124055055405 has 4 divisors (see below), whose sum is σ = 606148866066492. Its totient is φ = 404099244044320.

The previous prime is 505124055055387. The next prime is 505124055055441. The reversal of 505124055055405 is 504550550421505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157296295735524 + 347827759319881 = 12541782^2 + 18650141^2 .

It is not a de Polignac number, because 505124055055405 - 2⁹ = 505124055054893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50512405505536 + ... + 50512405505545.

It is an arithmetic number, because the mean of its divisors is an integer number (151537216516623).

Almost surely, 2^{505124055055405} is an apocalyptic number.

It is an amenable number.

505124055055405 is a deficient number, since it is larger than the sum of its proper divisors (101024811011087).

505124055055405 is a wasteful number, since it uses less digits than its factorization.

505124055055405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101024811011086.

The product of its (nonzero) digits is 2500000, while the sum is 46.

The spelling of 505124055055405 in words is "five hundred five trillion, one hundred twenty-four billion, fifty-five million, fifty-five thousand, four hundred five".