261646070160479 has 2 divisors, whose sum is σ = 261646070160480. Its totient is φ = 261646070160478.

The previous prime is 261646070160451. The next prime is 261646070160493. The reversal of 261646070160479 is 974061070646162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261646070160479 - 2²⁴ = 261646053383263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261646070960479) 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, 130823035080239 + 130823035080240.

It is an arithmetic number, because the mean of its divisors is an integer number (130823035080240).

Almost surely, 2^{261646070160479} is an apocalyptic number.

261646070160479 is a deficient number, since it is larger than the sum of its proper divisors (1).

261646070160479 is an equidigital number, since it uses as much as digits as its factorization.

261646070160479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18289152, while the sum is 59.

The spelling of 261646070160479 in words is "two hundred sixty-one trillion, six hundred forty-six billion, seventy million, one hundred sixty thousand, four hundred seventy-nine".