261682081751170 has 16 divisors (see below), whose sum is σ = 479915063137080. Its totient is φ = 102697873592704.

The previous prime is 261682081751161. The next prime is 261682081751231. The reversal of 261682081751170 is 71157180286162.

It can be written as a sum of positive squares in 4 ways, for example, as 261626387167161 + 55694584009 = 16174869^2 + 235997^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246869887915 + ... + 246869888974.

Almost surely, 2^{261682081751170} is an apocalyptic number.

261682081751170 is a deficient number, since it is larger than the sum of its proper divisors (218232981385910).

261682081751170 is a wasteful number, since it uses less digits than its factorization.

261682081751170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493739776949.

The product of its (nonzero) digits is 2257920, while the sum is 55.

The spelling of 261682081751170 in words is "two hundred sixty-one trillion, six hundred eighty-two billion, eighty-one million, seven hundred fifty-one thousand, one hundred seventy".