2661161234 has 16 divisors (see below), whose sum is σ = 4063180416. Its totient is φ = 1306832400.

The previous prime is 2661161233. The next prime is 2661161263. The reversal of 2661161234 is 4321611662.

It is a super-2 number, since 2×2661161234² = 14163558226688805512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2661161234.

It is not an unprimeable number, because it can be changed into a prime (2661161233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68519 + ... + 100085.

It is an arithmetic number, because the mean of its divisors is an integer number (253948776).

Almost surely, 2^2661161234 is an apocalyptic number.

2661161234 is a deficient number, since it is larger than the sum of its proper divisors (1402019182).

2661161234 is a wasteful number, since it uses less digits than its factorization.

2661161234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32321.

The product of its digits is 10368, while the sum is 32.

The square root of 2661161234 is about 51586.4442852965. Note that the first 3 decimals coincide. The cubic root of 2661161234 is about 1385.7675777560.

Adding to 2661161234 its reverse (4321611662), we get a palindrome (6982772896).

The spelling of 2661161234 in words is "two billion, six hundred sixty-one million, one hundred sixty-one thousand, two hundred thirty-four".