2279612161 has 4 divisors (see below), whose sum is σ = 2413707012. Its totient is φ = 2145517312.

The previous prime is 2279612149. The next prime is 2279612197. The reversal of 2279612161 is 1612169722.

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 1643815936 + 635796225 = 40544^2 + 25215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2279612161 - 2²⁵ = 2246057729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2279612161.

It is not an unprimeable number, because it can be changed into a prime (2279612131) 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, 67047400 + ... + 67047433.

It is an arithmetic number, because the mean of its divisors is an integer number (603426753).

Almost surely, 2^2279612161 is an apocalyptic number.

It is an amenable number.

2279612161 is a deficient number, since it is larger than the sum of its proper divisors (134094851).

2279612161 is a wasteful number, since it uses less digits than its factorization.

2279612161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134094850.

The product of its digits is 18144, while the sum is 37.

The square root of 2279612161 is about 47745.2841755078. The cubic root of 2279612161 is about 1316.0942399246.

The spelling of 2279612161 in words is "two billion, two hundred seventy-nine million, six hundred twelve thousand, one hundred sixty-one".