78672427686 has 32 divisors (see below), whose sum is σ = 180856159200. Its totient is φ = 25319861280.

The previous prime is 78672427679. The next prime is 78672427709. The reversal of 78672427686 is 68672427687.

78672427686 is a `hidden beast` number, since 7 + 86 + 72 + 427 + 68 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25117345 + ... + 25120476.

It is an arithmetic number, because the mean of its divisors is an integer number (5651754975).

Almost surely, 2^78672427686 is an apocalyptic number.

78672427686 is an abundant number, since it is smaller than the sum of its proper divisors (102183731514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78672427686 is a wasteful number, since it uses less digits than its factorization.

78672427686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50237861 (or 50237855 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 63.

Subtracting from 78672427686 its reverse (68672427687), we obtain a palindrome (9999999999).

The spelling of 78672427686 in words is "seventy-eight billion, six hundred seventy-two million, four hundred twenty-seven thousand, six hundred eighty-six".