78964964720 has 40 divisors (see below), whose sum is σ = 183793489440. Its totient is φ = 31551586560.

The previous prime is 78964964719. The next prime is 78964964723. The reversal of 78964964720 is 2746946987.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78964964723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463511 + ... + 610550.

It is an arithmetic number, because the mean of its divisors is an integer number (4594837236).

Almost surely, 2^78964964720 is an apocalyptic number.

It is an amenable number.

78964964720 is an abundant number, since it is smaller than the sum of its proper divisors (104828524720).

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

78964964720 is a wasteful number, since it uses less digits than its factorization.

78964964720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074993 (or 1074987 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 78964964720 in words is "seventy-eight billion, nine hundred sixty-four million, nine hundred sixty-four thousand, seven hundred twenty".