261270273116441 has 2 divisors, whose sum is σ = 261270273116442. Its totient is φ = 261270273116440.

The previous prime is 261270273116431. The next prime is 261270273116443. The reversal of 261270273116441 is 144611372072162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261269885184025 + 387932416 = 16163845^2 + 19696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261270273116441 is a prime.

It is a super-2 number, since 2×261270273116441² (a number of 30 digits) contains 22 as substring.

Together with 261270273116443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (261270273116443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130635136558220 + 130635136558221.

It is an arithmetic number, because the mean of its divisors is an integer number (130635136558221).

Almost surely, 2^{261270273116441} is an apocalyptic number.

It is an amenable number.

261270273116441 is a deficient number, since it is larger than the sum of its proper divisors (1).

261270273116441 is an equidigital number, since it uses as much as digits as its factorization.

261270273116441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 261270273116441 in words is "two hundred sixty-one trillion, two hundred seventy billion, two hundred seventy-three million, one hundred sixteen thousand, four hundred forty-one".