78336863387 has 2 divisors, whose sum is σ = 78336863388. Its totient is φ = 78336863386.

The previous prime is 78336863377. The next prime is 78336863419.

78336863387 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 78336863387 - 2²⁰ = 78335814811 is a prime.

It is a super-2 number, since 2×78336863387² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78336863327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39168431693 + 39168431694.

It is an arithmetic number, because the mean of its divisors is an integer number (39168431694).

Almost surely, 2^78336863387 is an apocalyptic number.

78336863387 is a deficient number, since it is larger than the sum of its proper divisors (1).

78336863387 is an equidigital number, since it uses as much as digits as its factorization.

78336863387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 62.

The spelling of 78336863387 in words is "seventy-eight billion, three hundred thirty-six million, eight hundred sixty-three thousand, three hundred eighty-seven".