78316787320 has 64 divisors (see below), whose sum is σ = 178111080000. Its totient is φ = 30989537280.

The previous prime is 78316787303. The next prime is 78316787321. The reversal of 78316787320 is 2378761387.

It is a super-2 number, since 2×78316787320² (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 (78316787321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13619806 + ... + 13625554.

It is an arithmetic number, because the mean of its divisors is an integer number (2782985625).

Almost surely, 2^78316787320 is an apocalyptic number.

It is an amenable number.

78316787320 is an abundant number, since it is smaller than the sum of its proper divisors (99794292680).

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

78316787320 is a wasteful number, since it uses less digits than its factorization.

78316787320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9368 (or 9364 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 78316787320 in words is "seventy-eight billion, three hundred sixteen million, seven hundred eighty-seven thousand, three hundred twenty".