78816005 has 8 divisors (see below), whose sum is σ = 95004672. Its totient is φ = 62769168.

The previous prime is 78815999. The next prime is 78816007. The reversal of 78816005 is 50061887.

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 78816005 - 2⁶ = 78815941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78816007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34229 + ... + 36458.

It is an arithmetic number, because the mean of its divisors is an integer number (11875584).

Almost surely, 2^78816005 is an apocalyptic number.

It is an amenable number.

78816005 is a deficient number, since it is larger than the sum of its proper divisors (16188667).

78816005 is a wasteful number, since it uses less digits than its factorization.

78816005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70915.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 78816005 is about 8877.8378561449. The cubic root of 78816005 is about 428.7506642630.

The spelling of 78816005 in words is "seventy-eight million, eight hundred sixteen thousand, five".