260211664570681 has 2 divisors, whose sum is σ = 260211664570682. Its totient is φ = 260211664570680.

The previous prime is 260211664570643. The next prime is 260211664570709. The reversal of 260211664570681 is 186075466112062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250920141330681 + 9291523240000 = 15840459^2 + 3048200^2 .

It is a cyclic number.

It is not a de Polignac number, because 260211664570681 - 2¹³ = 260211664562489 is a prime.

It is a super-2 number, since 2×260211664570681² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (260211664270681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130105832285340 + 130105832285341.

It is an arithmetic number, because the mean of its divisors is an integer number (130105832285341).

Almost surely, 2^{260211664570681} is an apocalyptic number.

It is an amenable number.

260211664570681 is a deficient number, since it is larger than the sum of its proper divisors (1).

260211664570681 is an equidigital number, since it uses as much as digits as its factorization.

260211664570681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 260211664570681 in words is "two hundred sixty trillion, two hundred eleven billion, six hundred sixty-four million, five hundred seventy thousand, six hundred eighty-one".