78946564446 has 12 divisors (see below), whose sum is σ = 171050889672. Its totient is φ = 26315521476.

The previous prime is 78946564427. The next prime is 78946564507. The reversal of 78946564446 is 64446564987.

It is a happy number.

78946564446 is a `hidden beast` number, since 78 + 9 + 4 + 65 + 64 + 446 = 666.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2192960106 + ... + 2192960141.

It is an arithmetic number, because the mean of its divisors is an integer number (14254240806).

Almost surely, 2^78946564446 is an apocalyptic number.

78946564446 is an abundant number, since it is smaller than the sum of its proper divisors (92104325226).

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

78946564446 is a wasteful number, since it uses less digits than its factorization.

78946564446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385920255 (or 4385920252 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 63.

The spelling of 78946564446 in words is "seventy-eight billion, nine hundred forty-six million, five hundred sixty-four thousand, four hundred forty-six".