550611161 has 4 divisors (see below), whose sum is σ = 550792500. Its totient is φ = 550429824.

The previous prime is 550611151. The next prime is 550611163. The reversal of 550611161 is 161116055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 517835536 + 32775625 = 22756^2 + 5725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550611161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 550611161.

It is not an unprimeable number, because it can be changed into a prime (550611163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86036 + ... + 92213.

It is an arithmetic number, because the mean of its divisors is an integer number (137698125).

Almost surely, 2^550611161 is an apocalyptic number.

It is an amenable number.

550611161 is a deficient number, since it is larger than the sum of its proper divisors (181339).

550611161 is a wasteful number, since it uses less digits than its factorization.

550611161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181338.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 550611161 is about 23465.1051776888. The cubic root of 550611161 is about 819.6246353571.

The spelling of 550611161 in words is "five hundred fifty million, six hundred eleven thousand, one hundred sixty-one".