78660780804123 has 16 divisors (see below), whose sum is σ = 122310251980800. Its totient is φ = 44949017601768.

The previous prime is 78660780804091. The next prime is 78660780804167. The reversal of 78660780804123 is 32140808706687.

It is a happy number.

It is not a de Polignac number, because 78660780804123 - 2⁵ = 78660780804091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78660780804173) 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 15 ways as a sum of consecutive naturals, for example, 38221952715 + ... + 38221954772.

It is an arithmetic number, because the mean of its divisors is an integer number (7644390748800).

Almost surely, 2^{78660780804123} is an apocalyptic number.

78660780804123 is a deficient number, since it is larger than the sum of its proper divisors (43649471176677).

78660780804123 is an equidigital number, since it uses as much as digits as its factorization.

78660780804123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76443907511 (or 76443907497 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 60.

The spelling of 78660780804123 in words is "seventy-eight trillion, six hundred sixty billion, seven hundred eighty million, eight hundred four thousand, one hundred twenty-three".