261617716162 has 16 divisors (see below), whose sum is σ = 438057572832. Its totient is φ = 116151628320.

The previous prime is 261617716121. The next prime is 261617716183.

261617716162 is nontrivially palindromic in base 10.

261617716162 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138274803 + ... + 138276694.

It is an arithmetic number, because the mean of its divisors is an integer number (27378598302).

Almost surely, 2^261617716162 is an apocalyptic number.

261617716162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261617716162 is a deficient number, since it is larger than the sum of its proper divisors (176439856670).

261617716162 is a wasteful number, since it uses less digits than its factorization.

261617716162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276551553.

The product of its digits is 254016, while the sum is 46.

It can be divided in two parts, 261617 and 716162, that added together give a palindrome (977779).

The spelling of 261617716162 in words is "two hundred sixty-one billion, six hundred seventeen million, seven hundred sixteen thousand, one hundred sixty-two".