261368755 has 8 divisors (see below), whose sum is σ = 313779600. Its totient is φ = 209003616.

The previous prime is 261368729. The next prime is 261368801. The reversal of 261368755 is 557863162.

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 261368755 - 2⁹ = 261368243 is a prime.

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, 2761 + ... + 23029.

It is an arithmetic number, because the mean of its divisors is an integer number (39222450).

Almost surely, 2^261368755 is an apocalyptic number.

261368755 is a deficient number, since it is larger than the sum of its proper divisors (52410845).

261368755 is a wasteful number, since it uses less digits than its factorization.

261368755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22853.

The product of its digits is 302400, while the sum is 43.

The square root of 261368755 is about 16166.9030738729. The cubic root of 261368755 is about 639.3684810586.

The spelling of 261368755 in words is "two hundred sixty-one million, three hundred sixty-eight thousand, seven hundred fifty-five".