260378208889 has 2 divisors, whose sum is σ = 260378208890. Its totient is φ = 260378208888.

The previous prime is 260378208887. The next prime is 260378208901. The reversal of 260378208889 is 988802873062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170862356025 + 89515852864 = 413355^2 + 299192^2 .

It is a cyclic number.

It is not a de Polignac number, because 260378208889 - 2¹ = 260378208887 is a prime.

It is a super-2 number, since 2×260378208889² (a number of 24 digits) contains 22 as substring.

Together with 260378208887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (260378208887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130189104444 + 130189104445.

It is an arithmetic number, because the mean of its divisors is an integer number (130189104445).

Almost surely, 2^260378208889 is an apocalyptic number.

It is an amenable number.

260378208889 is a deficient number, since it is larger than the sum of its proper divisors (1).

260378208889 is an equidigital number, since it uses as much as digits as its factorization.

260378208889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 260378208889 in words is "two hundred sixty billion, three hundred seventy-eight million, two hundred eight thousand, eight hundred eighty-nine".