2178261359 has 2 divisors, whose sum is σ = 2178261360. Its totient is φ = 2178261358.

The previous prime is 2178261347. The next prime is 2178261361. The reversal of 2178261359 is 9531628712.

2178261359 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2178261359 - 2⁴ = 2178261343 is a prime.

It is a super-2 number, since 2×2178261359² = 9489645096225053762, which contains 22 as substring.

Together with 2178261361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2178261329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089130679 + 1089130680.

It is an arithmetic number, because the mean of its divisors is an integer number (1089130680).

Almost surely, 2^2178261359 is an apocalyptic number.

2178261359 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178261359 is an equidigital number, since it uses as much as digits as its factorization.

2178261359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 2178261359 is about 46671.8476064533. The cubic root of 2178261359 is about 1296.2934575821.

The spelling of 2178261359 in words is "two billion, one hundred seventy-eight million, two hundred sixty-one thousand, three hundred fifty-nine".