260783278589 has 2 divisors, whose sum is σ = 260783278590. Its totient is φ = 260783278588.

The previous prime is 260783278579. The next prime is 260783278619. The reversal of 260783278589 is 985872387062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191377376089 + 69405902500 = 437467^2 + 263450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260783278589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260783278579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130391639294 + 130391639295.

It is an arithmetic number, because the mean of its divisors is an integer number (130391639295).

Almost surely, 2^260783278589 is an apocalyptic number.

It is an amenable number.

260783278589 is a deficient number, since it is larger than the sum of its proper divisors (1).

260783278589 is an equidigital number, since it uses as much as digits as its factorization.

260783278589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81285120, while the sum is 65.

The spelling of 260783278589 in words is "two hundred sixty billion, seven hundred eighty-three million, two hundred seventy-eight thousand, five hundred eighty-nine".