78734559612 has 48 divisors (see below), whose sum is σ = 187659343872. Its totient is φ = 25681446720.

The previous prime is 78734559569. The next prime is 78734559641. The reversal of 78734559612 is 21695543787.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3860562 + ... + 3880902.

It is an arithmetic number, because the mean of its divisors is an integer number (3909569664).

Almost surely, 2^78734559612 is an apocalyptic number.

It is an amenable number.

78734559612 is an abundant number, since it is smaller than the sum of its proper divisors (108924784260).

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

78734559612 is a wasteful number, since it uses less digits than its factorization.

78734559612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27258 (or 27256 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 57.

The spelling of 78734559612 in words is "seventy-eight billion, seven hundred thirty-four million, five hundred fifty-nine thousand, six hundred twelve".