261675257243173 has 8 divisors (see below), whose sum is σ = 275447922324800. Its totient is φ = 247902620473728.

The previous prime is 261675257243143. The next prime is 261675257243189. The reversal of 261675257243173 is 371342752576162.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261675257243173 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 (261675257243123) by changing a digit.

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, 13414768 + ... + 26519926.

It is an arithmetic number, because the mean of its divisors is an integer number (34430990290600).

Almost surely, 2^{261675257243173} is an apocalyptic number.

It is an amenable number.

261675257243173 is a deficient number, since it is larger than the sum of its proper divisors (13772665081627).

261675257243173 is a wasteful number, since it uses less digits than its factorization.

261675257243173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14156091.

The product of its digits is 88905600, while the sum is 61.

The spelling of 261675257243173 in words is "two hundred sixty-one trillion, six hundred seventy-five billion, two hundred fifty-seven million, two hundred forty-three thousand, one hundred seventy-three".