78877825844267 has 2 divisors, whose sum is σ = 78877825844268. Its totient is φ = 78877825844266.

The previous prime is 78877825844249. The next prime is 78877825844269. The reversal of 78877825844267 is 76244852877887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78877825844267 - 2⁸ = 78877825844011 is a prime.

It is a super-2 number, since 2×78877825844267² (a number of 29 digits) contains 22 as substring.

Together with 78877825844269, 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 (78877825844269) 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, 39438912922133 + 39438912922134.

It is an arithmetic number, because the mean of its divisors is an integer number (39438912922134).

Almost surely, 2^{78877825844267} is an apocalyptic number.

78877825844267 is a deficient number, since it is larger than the sum of its proper divisors (1).

78877825844267 is an equidigital number, since it uses as much as digits as its factorization.

78877825844267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18882232320, while the sum is 83.

The spelling of 78877825844267 in words is "seventy-eight trillion, eight hundred seventy-seven billion, eight hundred twenty-five million, eight hundred forty-four thousand, two hundred sixty-seven".