78316786528 has 24 divisors (see below), whose sum is σ = 155712775680. Its totient is φ = 38770684800.

The previous prime is 78316786523. The next prime is 78316786577. The reversal of 78316786528 is 82568761387.

It is a super-2 number, since 2×78316786528² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78316786523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12112608 + ... + 12119071.

It is an arithmetic number, because the mean of its divisors is an integer number (6488032320).

Almost surely, 2^78316786528 is an apocalyptic number.

It is an amenable number.

78316786528 is a deficient number, since it is larger than the sum of its proper divisors (77395989152).

78316786528 is a wasteful number, since it uses less digits than its factorization.

78316786528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24231790 (or 24231782 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 61.

The spelling of 78316786528 in words is "seventy-eight billion, three hundred sixteen million, seven hundred eighty-six thousand, five hundred twenty-eight".