261760043231 has 4 divisors (see below), whose sum is σ = 268834639032. Its totient is φ = 254685447432.

The previous prime is 261760043227. The next prime is 261760043257. The reversal of 261760043231 is 132340067162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132340067162 = 2 ⋅66170033581.

It is a cyclic number.

It is not a de Polignac number, because 261760043231 - 2² = 261760043227 is a prime.

It is a super-2 number, since 2×261760043231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261760043191 and 261760043200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261760043291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3537297845 + ... + 3537297918.

It is an arithmetic number, because the mean of its divisors is an integer number (67208659758).

Almost surely, 2^261760043231 is an apocalyptic number.

261760043231 is a deficient number, since it is larger than the sum of its proper divisors (7074595801).

261760043231 is an equidigital number, since it uses as much as digits as its factorization.

261760043231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7074595800.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 261760043231 in words is "two hundred sixty-one billion, seven hundred sixty million, forty-three thousand, two hundred thirty-one".