78888399047 has 2 divisors, whose sum is σ = 78888399048. Its totient is φ = 78888399046.

The previous prime is 78888399043. The next prime is 78888399053. The reversal of 78888399047 is 74099388887.

It is a weak prime.

It is an emirp because it is prime and its reverse (74099388887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78888399047 - 2² = 78888399043 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78888399043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39444199523 + 39444199524.

It is an arithmetic number, because the mean of its divisors is an integer number (39444199524).

Almost surely, 2^78888399047 is an apocalyptic number.

78888399047 is a deficient number, since it is larger than the sum of its proper divisors (1).

78888399047 is an equidigital number, since it uses as much as digits as its factorization.

78888399047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 195084288, while the sum is 71.

The spelling of 78888399047 in words is "seventy-eight billion, eight hundred eighty-eight million, three hundred ninety-nine thousand, forty-seven".