261365234255 has 8 divisors (see below), whose sum is σ = 315635978112. Its totient is φ = 207760389408.

The previous prime is 261365234233. The next prime is 261365234269. The reversal of 261365234255 is 552432563162.

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 261365234255 - 2¹⁰ = 261365233231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166473887 + ... + 166475456.

It is an arithmetic number, because the mean of its divisors is an integer number (39454497264).

Almost surely, 2^261365234255 is an apocalyptic number.

261365234255 is a deficient number, since it is larger than the sum of its proper divisors (54270743857).

261365234255 is a wasteful number, since it uses less digits than its factorization.

261365234255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332949505.

The product of its digits is 1296000, while the sum is 44.

The spelling of 261365234255 in words is "two hundred sixty-one billion, three hundred sixty-five million, two hundred thirty-four thousand, two hundred fifty-five".