505404640613 has 4 divisors (see below), whose sum is σ = 510311481888. Its totient is φ = 500497799340.

The previous prime is 505404640577. The next prime is 505404640619. The reversal of 505404640613 is 316046404505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505404640613 - 2⁸ = 505404640357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505404640619) by changing a digit.

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, 2453420483 + ... + 2453420688.

It is an arithmetic number, because the mean of its divisors is an integer number (127577870472).

Almost surely, 2^505404640613 is an apocalyptic number.

It is an amenable number.

505404640613 is a deficient number, since it is larger than the sum of its proper divisors (4906841275).

505404640613 is a wasteful number, since it uses less digits than its factorization.

505404640613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906841274.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 505404640613 in words is "five hundred five billion, four hundred four million, six hundred forty thousand, six hundred thirteen".