78689298687 has 8 divisors (see below), whose sum is σ = 105468380160. Its totient is φ = 52184874840.

The previous prime is 78689298671. The next prime is 78689298689.

78689298687 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78689298687 - 2⁴ = 78689298671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78689298689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68663737 + ... + 68664882.

It is an arithmetic number, because the mean of its divisors is an integer number (13183547520).

Almost surely, 2^78689298687 is an apocalyptic number.

78689298687 is a deficient number, since it is larger than the sum of its proper divisors (26779081473).

78689298687 is a wasteful number, since it uses less digits than its factorization.

78689298687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137328813.

The product of its digits is 1170505728, while the sum is 78.

The spelling of 78689298687 in words is "seventy-eight billion, six hundred eighty-nine million, two hundred ninety-eight thousand, six hundred eighty-seven".