503403661325 has 6 divisors (see below), whose sum is σ = 624220540074. Its totient is φ = 402722929040.

The previous prime is 503403661297. The next prime is 503403661331. The reversal of 503403661325 is 523166304305.

It can be written as a sum of positive squares in 3 ways, for example, as 169992114601 + 333411546724 = 412301^2 + 577418^2 .

It is not a de Polignac number, because 503403661325 - 2¹⁴ = 503403644941 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 (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10068073202 + ... + 10068073251.

It is an arithmetic number, because the mean of its divisors is an integer number (104036756679).

Almost surely, 2^503403661325 is an apocalyptic number.

It is an amenable number.

503403661325 is a deficient number, since it is larger than the sum of its proper divisors (120816878749).

503403661325 is a wasteful number, since it uses less digits than its factorization.

503403661325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20136146463 (or 20136146458 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 38.

The spelling of 503403661325 in words is "five hundred three billion, four hundred three million, six hundred sixty-one thousand, three hundred twenty-five".