261868725830 has 16 divisors (see below), whose sum is σ = 471403653984. Its totient is φ = 104738613120.

The previous prime is 261868725829. The next prime is 261868725851. The reversal of 261868725830 is 38527868162.

It is a happy number.

261868725830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 985091 + ... + 1222350.

It is an arithmetic number, because the mean of its divisors is an integer number (29462728374).

Almost surely, 2^261868725830 is an apocalyptic number.

261868725830 is a deficient number, since it is larger than the sum of its proper divisors (209534928154).

261868725830 is a wasteful number, since it uses less digits than its factorization.

261868725830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219311.

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 261868725830 in words is "two hundred sixty-one billion, eight hundred sixty-eight million, seven hundred twenty-five thousand, eight hundred thirty".