501164161 has 4 divisors (see below), whose sum is σ = 504165312. Its totient is φ = 498163012.

The previous prime is 501164143. The next prime is 501164249. The reversal of 501164161 is 161461105.

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 not a de Polignac number, because 501164161 - 2⁵ = 501164129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501164101) 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, 1500325 + ... + 1500658.

It is an arithmetic number, because the mean of its divisors is an integer number (126041328).

Almost surely, 2^501164161 is an apocalyptic number.

It is an amenable number.

501164161 is a deficient number, since it is larger than the sum of its proper divisors (3001151).

501164161 is a wasteful number, since it uses less digits than its factorization.

501164161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001150.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 501164161 is about 22386.6960715511. The cubic root of 501164161 is about 794.3160453206.

The spelling of 501164161 in words is "five hundred one million, one hundred sixty-four thousand, one hundred sixty-one".