78568637312 has 64 divisors (see below), whose sum is σ = 172410975360. Its totient is φ = 35366223360.

The previous prime is 78568637293. The next prime is 78568637317. The reversal of 78568637312 is 21373686587.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78568637317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125858 + ... + 415905.

It is an arithmetic number, because the mean of its divisors is an integer number (2693921490).

Almost surely, 2^78568637312 is an apocalyptic number.

It is an amenable number.

78568637312 is an abundant number, since it is smaller than the sum of its proper divisors (93842338048).

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

78568637312 is a wasteful number, since it uses less digits than its factorization.

78568637312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541891 (or 541879 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 56.

The spelling of 78568637312 in words is "seventy-eight billion, five hundred sixty-eight million, six hundred thirty-seven thousand, three hundred twelve".