78964446988 has 24 divisors (see below), whose sum is σ = 158285417472. Its totient is φ = 33765507984.

The previous prime is 78964446971. The next prime is 78964447039. The reversal of 78964446988 is 88964446987.

It is a self number, because there is not a number n which added to its sum of digits gives 78964446988.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3170620 + ... + 3195427.

It is an arithmetic number, because the mean of its divisors is an integer number (6595225728).

Almost surely, 2^78964446988 is an apocalyptic number.

It is an amenable number.

78964446988 is an abundant number, since it is smaller than the sum of its proper divisors (79320970484).

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

78964446988 is a wasteful number, since it uses less digits than its factorization.

78964446988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6366501 (or 6366499 counting only the distinct ones).

The product of its digits is 668860416, while the sum is 73.

Subtracting 78964446988 from its reverse (88964446987), we obtain a palindrome (9999999999).

The spelling of 78964446988 in words is "seventy-eight billion, nine hundred sixty-four million, four hundred forty-six thousand, nine hundred eighty-eight".