261168056867 has 4 divisors (see below), whose sum is σ = 261687278160. Its totient is φ = 260648835576.

The previous prime is 261168056791. The next prime is 261168056893. The reversal of 261168056867 is 768650861162.

261168056867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261168056867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261168050867) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 259609892 + ... + 259610897.

It is an arithmetic number, because the mean of its divisors is an integer number (65421819540).

Almost surely, 2^261168056867 is an apocalyptic number.

261168056867 is a deficient number, since it is larger than the sum of its proper divisors (519221293).

261168056867 is an equidigital number, since it uses as much as digits as its factorization.

261168056867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519221292.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 261168056867 in words is "two hundred sixty-one billion, one hundred sixty-eight million, fifty-six thousand, eight hundred sixty-seven".