503165541205445 has 24 divisors (see below), whose sum is σ = 641694281140968. Its totient is φ = 378683473996800.

The previous prime is 503165541205391. The next prime is 503165541205451. The reversal of 503165541205445 is 544502145561305.

It can be written as a sum of positive squares in 12 ways, for example, as 2783672012356 + 500381869193089 = 1668434^2 + 22369217^2 .

It is not a de Polignac number, because 503165541205445 - 2¹⁰ = 503165541204421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 503165541205393 and 503165541205402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75181346 + ... + 81600035.

It is an arithmetic number, because the mean of its divisors is an integer number (26737261714207).

Almost surely, 2^{503165541205445} is an apocalyptic number.

It is an amenable number.

503165541205445 is a deficient number, since it is larger than the sum of its proper divisors (138528739935523).

503165541205445 is a wasteful number, since it uses less digits than its factorization.

503165541205445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156783641 (or 156783624 counting only the distinct ones).

The product of its (nonzero) digits is 7200000, while the sum is 50.

The spelling of 503165541205445 in words is "five hundred three trillion, one hundred sixty-five billion, five hundred forty-one million, two hundred five thousand, four hundred forty-five".