78816172008 has 64 divisors (see below), whose sum is σ = 226908126720. Its totient is φ = 22347000000.

The previous prime is 78816171979. The next prime is 78816172031. The reversal of 78816172008 is 80027161887.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1768618 + ... + 1812633.

It is an arithmetic number, because the mean of its divisors is an integer number (3545439480).

Almost surely, 2^78816172008 is an apocalyptic number.

It is an amenable number.

78816172008 is an abundant number, since it is smaller than the sum of its proper divisors (148091954712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78816172008 is a wasteful number, since it uses less digits than its factorization.

78816172008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581398 (or 3581394 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 48.

The spelling of 78816172008 in words is "seventy-eight billion, eight hundred sixteen million, one hundred seventy-two thousand, eight".