505567161 has 36 divisors (see below), whose sum is σ = 808072356. Its totient is φ = 304349760.

The previous prime is 505567151. The next prime is 505567217. The reversal of 505567161 is 161765505.

It can be written as a sum of positive squares in 2 ways, for example, as 120033936 + 385533225 = 10956^2 + 19635^2 .

It is not a de Polignac number, because 505567161 - 2⁷ = 505567033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505567151) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 169495 + ... + 172451.

Almost surely, 2^505567161 is an apocalyptic number.

It is an amenable number.

505567161 is a deficient number, since it is larger than the sum of its proper divisors (302505195).

505567161 is a wasteful number, since it uses less digits than its factorization.

505567161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142 (or 3128 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 505567161 is about 22484.8206797386. The cubic root of 505567161 is about 796.6354324649.

The spelling of 505567161 in words is "five hundred five million, five hundred sixty-seven thousand, one hundred sixty-one".