78689965708 has 12 divisors (see below), whose sum is σ = 139366566360. Its totient is φ = 38870946752.

The previous prime is 78689965703. The next prime is 78689965723. The reversal of 78689965708 is 80756998687.

It is a super-2 number, since 2×78689965708² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78689965703) 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, 118508653 + ... + 118509316.

It is an arithmetic number, because the mean of its divisors is an integer number (11613880530).

Almost surely, 2^78689965708 is an apocalyptic number.

It is an amenable number.

78689965708 is a deficient number, since it is larger than the sum of its proper divisors (60676600652).

78689965708 is a wasteful number, since it uses less digits than its factorization.

78689965708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237018056 (or 237018054 counting only the distinct ones).

The product of its (nonzero) digits is 365783040, while the sum is 73.

The spelling of 78689965708 in words is "seventy-eight billion, six hundred eighty-nine million, nine hundred sixty-five thousand, seven hundred eight".