261646061312227 has 2 divisors, whose sum is σ = 261646061312228. Its totient is φ = 261646061312226.

The previous prime is 261646061312143. The next prime is 261646061312269. The reversal of 261646061312227 is 722213160646162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261646061312227 - 2⁷ = 261646061312099 is a prime.

It is a super-2 number, since 2×261646061312227² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (261646061318227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130823030656113 + 130823030656114.

It is an arithmetic number, because the mean of its divisors is an integer number (130823030656114).

Almost surely, 2^{261646061312227} is an apocalyptic number.

261646061312227 is a deficient number, since it is larger than the sum of its proper divisors (1).

261646061312227 is an equidigital number, since it uses as much as digits as its factorization.

261646061312227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 261646061312227 in words is "two hundred sixty-one trillion, six hundred forty-six billion, sixty-one million, three hundred twelve thousand, two hundred twenty-seven".