261262336047959 has 2 divisors, whose sum is σ = 261262336047960. Its totient is φ = 261262336047958.

The previous prime is 261262336047949. The next prime is 261262336048033. The reversal of 261262336047959 is 959740633262162.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261262336047959 - 2⁸ = 261262336047703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261262336047895 and 261262336047904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261262336047929) 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, 130631168023979 + 130631168023980.

It is an arithmetic number, because the mean of its divisors is an integer number (130631168023980).

Almost surely, 2^{261262336047959} is an apocalyptic number.

261262336047959 is a deficient number, since it is larger than the sum of its proper divisors (1).

261262336047959 is an equidigital number, since it uses as much as digits as its factorization.

261262336047959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176359680, while the sum is 65.

The spelling of 261262336047959 in words is "two hundred sixty-one trillion, two hundred sixty-two billion, three hundred thirty-six million, forty-seven thousand, nine hundred fifty-nine".