550740610161 has 27 divisors (see below), whose sum is σ = 925420273401. Its totient is φ = 314700014664.

The previous prime is 550740610111. The next prime is 550740610207. The reversal of 550740610161 is 161016047055.

It is a happy number.

The square root of 550740610161 is 742119.

It is a perfect power (a square), and thus also a powerful number.

550740610161 is a `hidden beast` number, since 5 + 507 + 40 + 6 + 101 + 6 + 1 = 666.

It is not a de Polignac number, because 550740610161 - 2²⁵ = 550707055729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550740610111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15566830 + ... + 15602168.

Almost surely, 2^550740610161 is an apocalyptic number.

550740610161 is the 742119-th square number.

550740610161 is the 371060-th centered octagonal number.

It is an amenable number.

550740610161 is a deficient number, since it is larger than the sum of its proper divisors (374679663240).

550740610161 is an frugal number, since it uses more digits than its factorization.

550740610161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70698 (or 35349 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

Multiplying 550740610161 by its sum of digits (36), we get a square (19826661965796 = 4452714²).

The spelling of 550740610161 in words is "five hundred fifty billion, seven hundred forty million, six hundred ten thousand, one hundred sixty-one".