78680172305 has 8 divisors (see below), whose sum is σ = 107904236352. Its totient is φ = 53952118128.

The previous prime is 78680172301. The next prime is 78680172323. The reversal of 78680172305 is 50327108687.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78680172305 - 2² = 78680172301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78680172305.

It is not an unprimeable number, because it can be changed into a prime (78680172301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124002427 + ... + 1124002496.

It is an arithmetic number, because the mean of its divisors is an integer number (13488029544).

Almost surely, 2^78680172305 is an apocalyptic number.

It is an amenable number.

78680172305 is a deficient number, since it is larger than the sum of its proper divisors (29224064047).

78680172305 is a wasteful number, since it uses less digits than its factorization.

78680172305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248004935.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 78680172305 in words is "seventy-eight billion, six hundred eighty million, one hundred seventy-two thousand, three hundred five".