261543700315043 has 2 divisors, whose sum is σ = 261543700315044. Its totient is φ = 261543700315042.

The previous prime is 261543700314991. The next prime is 261543700315067. The reversal of 261543700315043 is 340513007345162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261543700315043 - 2⁶ = 261543700314979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261543700314985 and 261543700315003.

It is not a weakly prime, because it can be changed into another prime (261543700315243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130771850157521 + 130771850157522.

It is an arithmetic number, because the mean of its divisors is an integer number (130771850157522).

Almost surely, 2^{261543700315043} is an apocalyptic number.

261543700315043 is a deficient number, since it is larger than the sum of its proper divisors (1).

261543700315043 is an equidigital number, since it uses as much as digits as its factorization.

261543700315043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 261543700315043 in words is "two hundred sixty-one trillion, five hundred forty-three billion, seven hundred million, three hundred fifteen thousand, forty-three".