261751107668711 has 2 divisors, whose sum is σ = 261751107668712. Its totient is φ = 261751107668710.

The previous prime is 261751107668663. The next prime is 261751107668779. The reversal of 261751107668711 is 117866701157162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261751107668711 - 2⁶ = 261751107668647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261751107698711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130875553834355 + 130875553834356.

It is an arithmetic number, because the mean of its divisors is an integer number (130875553834356).

Almost surely, 2^{261751107668711} is an apocalyptic number.

261751107668711 is a deficient number, since it is larger than the sum of its proper divisors (1).

261751107668711 is an equidigital number, since it uses as much as digits as its factorization.

261751107668711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 59.

The spelling of 261751107668711 in words is "two hundred sixty-one trillion, seven hundred fifty-one billion, one hundred seven million, six hundred sixty-eight thousand, seven hundred eleven".