878138818648211 has 2 divisors, whose sum is σ = 878138818648212. Its totient is φ = 878138818648210.

The previous prime is 878138818648141. The next prime is 878138818648213. The reversal of 878138818648211 is 112846818831878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878138818648211 - 2¹⁰ = 878138818647187 is a prime.

It is a super-2 number, since 2×878138818648211² (a number of 31 digits) contains 22 as substring.

Together with 878138818648213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (878138818648213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439069409324105 + 439069409324106.

It is an arithmetic number, because the mean of its divisors is an integer number (439069409324106).

Almost surely, 2^{878138818648211} is an apocalyptic number.

878138818648211 is a deficient number, since it is larger than the sum of its proper divisors (1).

878138818648211 is an equidigital number, since it uses as much as digits as its factorization.

878138818648211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264241152, while the sum is 74.

The spelling of 878138818648211 in words is "eight hundred seventy-eight trillion, one hundred thirty-eight billion, eight hundred eighteen million, six hundred forty-eight thousand, two hundred eleven".