260688021169 has 2 divisors, whose sum is σ = 260688021170. Its totient is φ = 260688021168.

The previous prime is 260688021157. The next prime is 260688021247. The reversal of 260688021169 is 961120886062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209684315569 + 51003705600 = 457913^2 + 225840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260688021169 is a prime.

It is a super-2 number, since 2×260688021169² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (260688031169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130344010584 + 130344010585.

It is an arithmetic number, because the mean of its divisors is an integer number (130344010585).

Almost surely, 2^260688021169 is an apocalyptic number.

It is an amenable number.

260688021169 is a deficient number, since it is larger than the sum of its proper divisors (1).

260688021169 is an equidigital number, since it uses as much as digits as its factorization.

260688021169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 260688021169 in words is "two hundred sixty billion, six hundred eighty-eight million, twenty-one thousand, one hundred sixty-nine".