261122672561222 has 16 divisors (see below), whose sum is σ = 408147947811360. Its totient is φ = 125139080931648.

The previous prime is 261122672561213. The next prime is 261122672561239. The reversal of 261122672561222 is 222165276221162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16431068858 + ... + 16431084749.

It is an arithmetic number, because the mean of its divisors is an integer number (25509246738210).

Almost surely, 2^{261122672561222} is an apocalyptic number.

261122672561222 is a deficient number, since it is larger than the sum of its proper divisors (147025275250138).

261122672561222 is a wasteful number, since it uses less digits than its factorization.

261122672561222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32862153775.

The product of its digits is 967680, while the sum is 47.

The spelling of 261122672561222 in words is "two hundred sixty-one trillion, one hundred twenty-two billion, six hundred seventy-two million, five hundred sixty-one thousand, two hundred twenty-two".