78688307668959 has 64 divisors (see below), whose sum is σ = 123503044049280. Its totient is φ = 49344904028160.

The previous prime is 78688307668931. The next prime is 78688307668963. The reversal of 78688307668959 is 95986670388687.

78688307668959 is a `hidden beast` number, since 7 + 86 + 88 + 307 + 6 + 68 + 95 + 9 = 666.

It is not a de Polignac number, because 78688307668959 - 2⁸ = 78688307668703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78688307668969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10963951779 + ... + 10963958955.

It is an arithmetic number, because the mean of its divisors is an integer number (1929735063270).

Almost surely, 2^{78688307668959} is an apocalyptic number.

78688307668959 is a deficient number, since it is larger than the sum of its proper divisors (44814736380321).

78688307668959 is a wasteful number, since it uses less digits than its factorization.

78688307668959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17497 (or 17491 counting only the distinct ones).

The product of its (nonzero) digits is 52672757760, while the sum is 90.

The spelling of 78688307668959 in words is "seventy-eight trillion, six hundred eighty-eight billion, three hundred seven million, six hundred sixty-eight thousand, nine hundred fifty-nine".