260387538991 has 2 divisors, whose sum is σ = 260387538992. Its totient is φ = 260387538990.

The previous prime is 260387538989. The next prime is 260387539051. The reversal of 260387538991 is 199835783062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260387538991 - 2¹ = 260387538989 is a prime.

It is a super-3 number, since 3×260387538991³ (a number of 35 digits) contains 333 as substring.

Together with 260387538989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260387538911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130193769495 + 130193769496.

It is an arithmetic number, because the mean of its divisors is an integer number (130193769496).

Almost surely, 2^260387538991 is an apocalyptic number.

260387538991 is a deficient number, since it is larger than the sum of its proper divisors (1).

260387538991 is an equidigital number, since it uses as much as digits as its factorization.

260387538991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 260387538991 in words is "two hundred sixty billion, three hundred eighty-seven million, five hundred thirty-eight thousand, nine hundred ninety-one".