261536873 has 8 divisors (see below), whose sum is σ = 283132416. Its totient is φ = 240152400.

The previous prime is 261536839. The next prime is 261536893. The reversal of 261536873 is 378635162.

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 261536873 - 2¹⁴ = 261520489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261536873.

It is not an unprimeable number, because it can be changed into a prime (261536893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50183 + ... + 55148.

It is an arithmetic number, because the mean of its divisors is an integer number (35391552).

Almost surely, 2^261536873 is an apocalyptic number.

It is an amenable number.

261536873 is a deficient number, since it is larger than the sum of its proper divisors (21595543).

261536873 is a wasteful number, since it uses less digits than its factorization.

261536873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105535.

The product of its digits is 181440, while the sum is 41.

The square root of 261536873 is about 16172.1016877832. The cubic root of 261536873 is about 639.5055368594.

The spelling of 261536873 in words is "two hundred sixty-one million, five hundred thirty-six thousand, eight hundred seventy-three".