78682628687 has 4 divisors (see below), whose sum is σ = 84735138600. Its totient is φ = 72630118776.

The previous prime is 78682628681. The next prime is 78682628719.

78682628687 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78682628687 - 2⁴ = 78682628671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78682628681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3026254937 + ... + 3026254962.

It is an arithmetic number, because the mean of its divisors is an integer number (21183784650).

Almost surely, 2^78682628687 is an apocalyptic number.

78682628687 is a deficient number, since it is larger than the sum of its proper divisors (6052509913).

78682628687 is a wasteful number, since it uses less digits than its factorization.

78682628687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052509912.

The product of its digits is 173408256, while the sum is 68.

The spelling of 78682628687 in words is "seventy-eight billion, six hundred eighty-two million, six hundred twenty-eight thousand, six hundred eighty-seven".