78689288682 has 12 divisors (see below), whose sum is σ = 170493458850. Its totient is φ = 26229762888.

The previous prime is 78689288659. The next prime is 78689288707. The reversal of 78689288682 is 28688298687.

It can be written as a sum of positive squares in only one way, i.e., 57135818961 + 21553469721 = 239031^2 + 146811^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78689288682.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2185813557 + ... + 2185813592.

Almost surely, 2^78689288682 is an apocalyptic number.

78689288682 is an abundant number, since it is smaller than the sum of its proper divisors (91804170168).

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

78689288682 is a wasteful number, since it uses less digits than its factorization.

78689288682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371627157 (or 4371627154 counting only the distinct ones).

The product of its digits is 297271296, while the sum is 72.

The spelling of 78689288682 in words is "seventy-eight billion, six hundred eighty-nine million, two hundred eighty-eight thousand, six hundred eighty-two".