78888599588849 has 2 divisors, whose sum is σ = 78888599588850. Its totient is φ = 78888599588848.

The previous prime is 78888599588801. The next prime is 78888599588893. The reversal of 78888599588849 is 94888599588887.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47200087733824 + 31688511855025 = 6870232^2 + 5629255^2 .

It is a cyclic number.

It is not a de Polignac number, because 78888599588849 - 2²⁰ = 78888598540273 is a prime.

It is a super-2 number, since 2×78888599588849² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78888599588749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39444299794424 + 39444299794425.

It is an arithmetic number, because the mean of its divisors is an integer number (39444299794425).

Almost surely, 2^{78888599588849} is an apocalyptic number.

It is an amenable number.

78888599588849 is a deficient number, since it is larger than the sum of its proper divisors (1).

78888599588849 is an equidigital number, since it uses as much as digits as its factorization.

78888599588849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1070176665600, while the sum is 104.

The spelling of 78888599588849 in words is "seventy-eight trillion, eight hundred eighty-eight billion, five hundred ninety-nine million, five hundred eighty-eight thousand, eight hundred forty-nine".