78688138073704 has 8 divisors (see below), whose sum is σ = 147540258888210. Its totient is φ = 39344069036848.

The previous prime is 78688138073663. The next prime is 78688138073771. The reversal of 78688138073704 is 40737083188687.

It can be written as a sum of positive squares in only one way, i.e., 61396596017604 + 17291542056100 = 7835598^2 + 4158310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4918008629599 + ... + 4918008629614.

Almost surely, 2^{78688138073704} is an apocalyptic number.

It is an amenable number.

78688138073704 is a deficient number, since it is larger than the sum of its proper divisors (68852120814506).

78688138073704 is a wasteful number, since it uses less digits than its factorization.

78688138073704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9836017259219 (or 9836017259215 counting only the distinct ones).

The product of its (nonzero) digits is 303464448, while the sum is 70.

The spelling of 78688138073704 in words is "seventy-eight trillion, six hundred eighty-eight billion, one hundred thirty-eight million, seventy-three thousand, seven hundred four".