261085853 has 8 divisors (see below), whose sum is σ = 299241600. Its totient is φ = 223144560.

The previous prime is 261085831. The next prime is 261085871. The reversal of 261085853 is 358580162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261085853 - 2⁸ = 261085597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261085823) 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 7 ways as a sum of consecutive naturals, for example, 50993 + ... + 55878.

It is an arithmetic number, because the mean of its divisors is an integer number (37405200).

Almost surely, 2^261085853 is an apocalyptic number.

It is an amenable number.

261085853 is a deficient number, since it is larger than the sum of its proper divisors (38155747).

261085853 is a wasteful number, since it uses less digits than its factorization.

261085853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107227.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 261085853 is about 16158.1512865798. The cubic root of 261085853 is about 639.1377165187.

The spelling of 261085853 in words is "two hundred sixty-one million, eighty-five thousand, eight hundred fifty-three".