261534452164147 has 2 divisors, whose sum is σ = 261534452164148. Its totient is φ = 261534452164146.

The previous prime is 261534452164121. The next prime is 261534452164199. The reversal of 261534452164147 is 741461254435162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261534452164147 - 2³¹ = 261532304680499 is a prime.

It is not a weakly prime, because it can be changed into another prime (261534452104147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130767226082073 + 130767226082074.

It is an arithmetic number, because the mean of its divisors is an integer number (130767226082074).

Almost surely, 2^{261534452164147} is an apocalyptic number.

261534452164147 is a deficient number, since it is larger than the sum of its proper divisors (1).

261534452164147 is an equidigital number, since it uses as much as digits as its factorization.

261534452164147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19353600, while the sum is 55.

The spelling of 261534452164147 in words is "two hundred sixty-one trillion, five hundred thirty-four billion, four hundred fifty-two million, one hundred sixty-four thousand, one hundred forty-seven".