78689098687 has 16 divisors (see below), whose sum is σ = 84541968864. Its totient is φ = 72979200000.

The previous prime is 78689098679. The next prime is 78689098717.

78689098687 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 78689098687 - 2³ = 78689098679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78689098487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253687 + ... + 470887.

It is an arithmetic number, because the mean of its divisors is an integer number (5283873054).

Almost surely, 2^78689098687 is an apocalyptic number.

78689098687 is a deficient number, since it is larger than the sum of its proper divisors (5852870177).

78689098687 is a wasteful number, since it uses less digits than its factorization.

78689098687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217530.

The product of its (nonzero) digits is 585252864, while the sum is 76.

The spelling of 78689098687 in words is "seventy-eight billion, six hundred eighty-nine million, ninety-eight thousand, six hundred eighty-seven".