261543700315411 has 2 divisors, whose sum is σ = 261543700315412. Its totient is φ = 261543700315410.

The previous prime is 261543700315397. The next prime is 261543700315421. The reversal of 261543700315411 is 114513007345162.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261543700315411 is a prime.

It is not a weakly prime, because it can be changed into another prime (261543700315421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130771850157705 + 130771850157706.

It is an arithmetic number, because the mean of its divisors is an integer number (130771850157706).

Almost surely, 2^{261543700315411} is an apocalyptic number.

261543700315411 is a deficient number, since it is larger than the sum of its proper divisors (1).

261543700315411 is an equidigital number, since it uses as much as digits as its factorization.

261543700315411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 261543700315411 in words is "two hundred sixty-one trillion, five hundred forty-three billion, seven hundred million, three hundred fifteen thousand, four hundred eleven".