261113112673873 has 8 divisors (see below), whose sum is σ = 279009154397160. Its totient is φ = 243498898379520.

The previous prime is 261113112673867. The next prime is 261113112673879. The reversal of 261113112673873 is 378376211311162.

It is an interprime number because it is at equal distance from previous prime (261113112673867) and next prime (261113112673879).

It can be written as a sum of positive squares in 4 ways, for example, as 127842550335504 + 133270562338369 = 11306748^2 + 11544287^2 .

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

It is not a de Polignac number, because 261113112673873 - 2²⁵ = 261113079119441 is a prime.

It is a super-2 number, since 2×261113112673873² (a number of 30 digits) contains 22 as substring.

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 261113112673873.

It is not an unprimeable number, because it can be changed into a prime (261113112673879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70456855318 + ... + 70456859023.

It is an arithmetic number, because the mean of its divisors is an integer number (34876144299645).

Almost surely, 2^{261113112673873} is an apocalyptic number.

It is an amenable number.

261113112673873 is a deficient number, since it is larger than the sum of its proper divisors (17896041723287).

261113112673873 is a wasteful number, since it uses less digits than its factorization.

261113112673873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140913714467.

The product of its digits is 1524096, while the sum is 52.

The spelling of 261113112673873 in words is "two hundred sixty-one trillion, one hundred thirteen billion, one hundred twelve million, six hundred seventy-three thousand, eight hundred seventy-three".