503403136545 has 16 divisors (see below), whose sum is σ = 805742186112. Its totient is φ = 268382616960.

The previous prime is 503403136543. The next prime is 503403136583. The reversal of 503403136545 is 545631304305.

It is not a de Polignac number, because 503403136545 - 2¹ = 503403136543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (503403136543) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6148972 + ... + 6230301.

It is an arithmetic number, because the mean of its divisors is an integer number (50358886632).

Almost surely, 2^503403136545 is an apocalyptic number.

It is an amenable number.

503403136545 is a deficient number, since it is larger than the sum of its proper divisors (302339049567).

503403136545 is a wasteful number, since it uses less digits than its factorization.

503403136545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12381992.

The product of its (nonzero) digits is 324000, while the sum is 39.

The spelling of 503403136545 in words is "five hundred three billion, four hundred three million, one hundred thirty-six thousand, five hundred forty-five".