50516566505 has 4 divisors (see below), whose sum is σ = 60619879812. Its totient is φ = 40413253200.

The previous prime is 50516566433. The next prime is 50516566523. The reversal of 50516566505 is 50566561505.

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 6034803856 + 44481762649 = 77684^2 + 210907^2 .

It is not a de Polignac number, because 50516566505 - 2⁸ = 50516566249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5051656646 + ... + 5051656655.

It is an arithmetic number, because the mean of its divisors is an integer number (15154969953).

Almost surely, 2^50516566505 is an apocalyptic number.

It is an amenable number.

50516566505 is a deficient number, since it is larger than the sum of its proper divisors (10103313307).

50516566505 is a wasteful number, since it uses less digits than its factorization.

50516566505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10103313306.

The product of its (nonzero) digits is 675000, while the sum is 44.

Subtracting 50516566505 from its reverse (50566561505), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 50516566505 in words is "fifty billion, five hundred sixteen million, five hundred sixty-six thousand, five hundred five".