550165515161 has 4 divisors (see below), whose sum is σ = 550181712000. Its totient is φ = 550149318324.

The previous prime is 550165515143. The next prime is 550165515187. The reversal of 550165515161 is 161515561055.

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 a de Polignac number, because none of the positive numbers 2^k-550165515161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550165515131) 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, 8047361 + ... + 8115438.

It is an arithmetic number, because the mean of its divisors is an integer number (137545428000).

Almost surely, 2^550165515161 is an apocalyptic number.

It is an amenable number.

550165515161 is a deficient number, since it is larger than the sum of its proper divisors (16196839).

550165515161 is a wasteful number, since it uses less digits than its factorization.

550165515161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16196838.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 550165515161 in words is "five hundred fifty billion, one hundred sixty-five million, five hundred fifteen thousand, one hundred sixty-one".