261311847067 has 2 divisors, whose sum is σ = 261311847068. Its totient is φ = 261311847066.

The previous prime is 261311846963. The next prime is 261311847107. The reversal of 261311847067 is 760748113162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261311847067 - 2¹⁵ = 261311814299 is a prime.

It is not a weakly prime, because it can be changed into another prime (261311847967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130655923533 + 130655923534.

It is an arithmetic number, because the mean of its divisors is an integer number (130655923534).

Almost surely, 2^261311847067 is an apocalyptic number.

261311847067 is a deficient number, since it is larger than the sum of its proper divisors (1).

261311847067 is an equidigital number, since it uses as much as digits as its factorization.

261311847067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 261311847067 in words is "two hundred sixty-one billion, three hundred eleven million, eight hundred forty-seven thousand, sixty-seven".