78936768687 has 48 divisors (see below), whose sum is σ = 133033804800. Its totient is φ = 41354167680.

The previous prime is 78936768667. The next prime is 78936768707. The reversal of 78936768687 is 78686763987.

It is an interprime number because it is at equal distance from previous prime (78936768667) and next prime (78936768707).

It is not a de Polignac number, because 78936768687 - 2¹¹ = 78936766639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78936768667) 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 in 47 ways as a sum of consecutive naturals, for example, 369262 + ... + 542427.

It is an arithmetic number, because the mean of its divisors is an integer number (2771537600).

Almost surely, 2^78936768687 is an apocalyptic number.

78936768687 is a deficient number, since it is larger than the sum of its proper divisors (54097036113).

78936768687 is a wasteful number, since it uses less digits than its factorization.

78936768687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911756 (or 911749 counting only the distinct ones).

The product of its digits is 1024192512, while the sum is 75.

The spelling of 78936768687 in words is "seventy-eight billion, nine hundred thirty-six million, seven hundred sixty-eight thousand, six hundred eighty-seven".