261713668 has 24 divisors (see below), whose sum is σ = 472094784. Its totient is φ = 126890400.

The previous prime is 261713651. The next prime is 261713671. The reversal of 261713668 is 866317162.

It is a happy number.

261713668 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261713668.

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, 9771 + ... + 24877.

It is an arithmetic number, because the mean of its divisors is an integer number (19670616).

Almost surely, 2^261713668 is an apocalyptic number.

It is an amenable number.

261713668 is a deficient number, since it is larger than the sum of its proper divisors (210381116).

261713668 is a wasteful number, since it uses less digits than its factorization.

261713668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15243 (or 15241 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 261713668 is about 16177.5668133375. The cubic root of 261713668 is about 639.6496031163.

The spelling of 261713668 in words is "two hundred sixty-one million, seven hundred thirteen thousand, six hundred sixty-eight".