41561232100261 has 2 divisors, whose sum is σ = 41561232100262. Its totient is φ = 41561232100260.

The previous prime is 41561232100231. The next prime is 41561232100279. The reversal of 41561232100261 is 16200123216514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34627410864036 + 6933821236225 = 5884506^2 + 2633215^2 .

It is a cyclic number.

It is not a de Polignac number, because 41561232100261 - 2³³ = 41552642165669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41561232100231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20780616050130 + 20780616050131.

It is an arithmetic number, because the mean of its divisors is an integer number (20780616050131).

Almost surely, 2^{41561232100261} is an apocalyptic number.

It is an amenable number.

41561232100261 is a deficient number, since it is larger than the sum of its proper divisors (1).

41561232100261 is an equidigital number, since it uses as much as digits as its factorization.

41561232100261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 41561232100261 its reverse (16200123216514), we get a palindrome (57761355316775).

The spelling of 41561232100261 in words is "forty-one trillion, five hundred sixty-one billion, two hundred thirty-two million, one hundred thousand, two hundred sixty-one".