261365272483223 has 16 divisors (see below), whose sum is σ = 267038488260000. Its totient is φ = 255736298237952.

The previous prime is 261365272483199. The next prime is 261365272483241. The reversal of 261365272483223 is 322384272563162.

It is a cyclic number.

It is not a de Polignac number, because 261365272483223 - 2⁴⁴ = 243773086438807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261365272483243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1226540 + ... + 22896177.

It is an arithmetic number, because the mean of its divisors is an integer number (16689905516250).

Almost surely, 2^{261365272483223} is an apocalyptic number.

261365272483223 is a deficient number, since it is larger than the sum of its proper divisors (5673215776777).

261365272483223 is a wasteful number, since it uses less digits than its factorization.

261365272483223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24123634.

The product of its digits is 34836480, while the sum is 56.

The spelling of 261365272483223 in words is "two hundred sixty-one trillion, three hundred sixty-five billion, two hundred seventy-two million, four hundred eighty-three thousand, two hundred twenty-three".