261676125726287 has 2 divisors, whose sum is σ = 261676125726288. Its totient is φ = 261676125726286.

The previous prime is 261676125726283. The next prime is 261676125726361. The reversal of 261676125726287 is 782627521676162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261676125726287 - 2² = 261676125726283 is a prime.

It is a super-2 number, since 2×261676125726287² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261676125726283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130838062863143 + 130838062863144.

It is an arithmetic number, because the mean of its divisors is an integer number (130838062863144).

Almost surely, 2^{261676125726287} is an apocalyptic number.

261676125726287 is a deficient number, since it is larger than the sum of its proper divisors (1).

261676125726287 is an equidigital number, since it uses as much as digits as its factorization.

261676125726287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 284497920, while the sum is 68.

The spelling of 261676125726287 in words is "two hundred sixty-one trillion, six hundred seventy-six billion, one hundred twenty-five million, seven hundred twenty-six thousand, two hundred eighty-seven".