503365173161 has 4 divisors (see below), whose sum is σ = 519602759424. Its totient is φ = 487127586900.

The previous prime is 503365173151. The next prime is 503365173209. The reversal of 503365173161 is 161371563305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503365173161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503365173151) 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, 8118793085 + ... + 8118793146.

It is an arithmetic number, because the mean of its divisors is an integer number (129900689856).

Almost surely, 2^503365173161 is an apocalyptic number.

It is an amenable number.

503365173161 is a deficient number, since it is larger than the sum of its proper divisors (16237586263).

503365173161 is a wasteful number, since it uses less digits than its factorization.

503365173161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16237586262.

The product of its (nonzero) digits is 170100, while the sum is 41.

The spelling of 503365173161 in words is "five hundred three billion, three hundred sixty-five million, one hundred seventy-three thousand, one hundred sixty-one".