505550450543 has 4 divisors (see below), whose sum is σ = 509531162880. Its totient is φ = 501569738208.

The previous prime is 505550450479. The next prime is 505550450593. The reversal of 505550450543 is 345054055505.

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

It is a cyclic number.

It is not a de Polignac number, because 505550450543 - 2⁶ = 505550450479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505550450543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505550450593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1990355978 + ... + 1990356231.

It is an arithmetic number, because the mean of its divisors is an integer number (127382790720).

Almost surely, 2^505550450543 is an apocalyptic number.

505550450543 is a deficient number, since it is larger than the sum of its proper divisors (3980712337).

505550450543 is a wasteful number, since it uses less digits than its factorization.

505550450543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980712336.

The product of its (nonzero) digits is 750000, while the sum is 41.

The spelling of 505550450543 in words is "five hundred five billion, five hundred fifty million, four hundred fifty thousand, five hundred forty-three".