261646061306131 has 2 divisors, whose sum is σ = 261646061306132. Its totient is φ = 261646061306130.

The previous prime is 261646061306101. The next prime is 261646061306177. The reversal of 261646061306131 is 131603160646162.

261646061306131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (261646061306177) can be obtained adding 261646061306131 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261646061306131 - 2¹⁹ = 261646060781843 is a prime.

It is a super-2 number, since 2×261646061306131² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (261646061306101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130823030653065 + 130823030653066.

It is an arithmetic number, because the mean of its divisors is an integer number (130823030653066).

Almost surely, 2^{261646061306131} is an apocalyptic number.

261646061306131 is a deficient number, since it is larger than the sum of its proper divisors (1).

261646061306131 is an equidigital number, since it uses as much as digits as its factorization.

261646061306131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 261646061306131 in words is "two hundred sixty-one trillion, six hundred forty-six billion, sixty-one million, three hundred six thousand, one hundred thirty-one".