261361605330141 has 4 divisors (see below), whose sum is σ = 348482140440192. Its totient is φ = 174241070220092.

The previous prime is 261361605330139. The next prime is 261361605330169. The reversal of 261361605330141 is 141033506163162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 261361605330141 - 2¹ = 261361605330139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261361605330093 and 261361605330102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261361605335141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43560267555021 + ... + 43560267555026.

It is an arithmetic number, because the mean of its divisors is an integer number (87120535110048).

Almost surely, 2^{261361605330141} is an apocalyptic number.

It is an amenable number.

261361605330141 is a deficient number, since it is larger than the sum of its proper divisors (87120535110051).

261361605330141 is an equidigital number, since it uses as much as digits as its factorization.

261361605330141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87120535110050.

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 261361605330141 in words is "two hundred sixty-one trillion, three hundred sixty-one billion, six hundred five million, three hundred thirty thousand, one hundred forty-one".