503499805543 has 16 divisors (see below), whose sum is σ = 586866980160. Its totient is φ = 423008441856.

The previous prime is 503499805537. The next prime is 503499805559. The reversal of 503499805543 is 345508994305.

It is not a de Polignac number, because 503499805543 - 2¹⁷ = 503499674471 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 (503499805243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298180 + ... + 1046857.

It is an arithmetic number, because the mean of its divisors is an integer number (36679186260).

Almost surely, 2^503499805543 is an apocalyptic number.

503499805543 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

503499805543 is a deficient number, since it is larger than the sum of its proper divisors (83367174617).

503499805543 is a wasteful number, since it uses less digits than its factorization.

503499805543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346106.

The product of its (nonzero) digits is 11664000, while the sum is 55.

The spelling of 503499805543 in words is "five hundred three billion, four hundred ninety-nine million, eight hundred five thousand, five hundred forty-three".