503391850161 has 32 divisors (see below), whose sum is σ = 687650808960. Its totient is φ = 327437420544.

The previous prime is 503391850147. The next prime is 503391850177. The reversal of 503391850161 is 161058193305.

It is not a de Polignac number, because 503391850161 - 2⁶ = 503391850097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (503391850121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33522891 + ... + 33537903.

It is an arithmetic number, because the mean of its divisors is an integer number (21489087780).

Almost surely, 2^503391850161 is an apocalyptic number.

It is an amenable number.

503391850161 is a deficient number, since it is larger than the sum of its proper divisors (184258958799).

503391850161 is a wasteful number, since it uses less digits than its factorization.

503391850161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16225.

The product of its (nonzero) digits is 97200, while the sum is 42.

The spelling of 503391850161 in words is "five hundred three billion, three hundred ninety-one million, eight hundred fifty thousand, one hundred sixty-one".