261743225111 has 2 divisors, whose sum is σ = 261743225112. Its totient is φ = 261743225110.

The previous prime is 261743225017. The next prime is 261743225113. The reversal of 261743225111 is 111522347162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261743225111 - 2¹⁰ = 261743224087 is a prime.

Together with 261743225113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261743225113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130871612555 + 130871612556.

It is an arithmetic number, because the mean of its divisors is an integer number (130871612556).

Almost surely, 2^261743225111 is an apocalyptic number.

261743225111 is a deficient number, since it is larger than the sum of its proper divisors (1).

261743225111 is an equidigital number, since it uses as much as digits as its factorization.

261743225111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The spelling of 261743225111 in words is "two hundred sixty-one billion, seven hundred forty-three million, two hundred twenty-five thousand, one hundred eleven".