504552556405 has 4 divisors (see below), whose sum is σ = 605463067692. Its totient is φ = 403642045120.

The previous prime is 504552556381. The next prime is 504552556439. The reversal of 504552556405 is 504655255405.

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 204789736369 + 299762820036 = 452537^2 + 547506^2 .

It is not a de Polignac number, because 504552556405 - 2⁹ = 504552555893 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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50455255636 + ... + 50455255645.

It is an arithmetic number, because the mean of its divisors is an integer number (151365766923).

Almost surely, 2^504552556405 is an apocalyptic number.

It is an amenable number.

504552556405 is a deficient number, since it is larger than the sum of its proper divisors (100910511287).

504552556405 is a wasteful number, since it uses less digits than its factorization.

504552556405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100910511286.

The product of its (nonzero) digits is 3000000, while the sum is 46.

The spelling of 504552556405 in words is "five hundred four billion, five hundred fifty-two million, five hundred fifty-six thousand, four hundred five".