78584521556860 has 48 divisors (see below), whose sum is σ = 180430952738400. Its totient is φ = 28512545546240.

The previous prime is 78584521556833. The next prime is 78584521556899. The reversal of 78584521556860 is 6865512548587.

It is a self number, because there is not a number n which added to its sum of digits gives 78584521556860.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397676689 + ... + 397874248.

It is an arithmetic number, because the mean of its divisors is an integer number (3758978182050).

Almost surely, 2^{78584521556860} is an apocalyptic number.

It is an amenable number.

78584521556860 is an abundant number, since it is smaller than the sum of its proper divisors (101846431181540).

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

78584521556860 is a wasteful number, since it uses less digits than its factorization.

78584521556860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795551406 (or 795551404 counting only the distinct ones).

The product of its (nonzero) digits is 645120000, while the sum is 70.

The spelling of 78584521556860 in words is "seventy-eight trillion, five hundred eighty-four billion, five hundred twenty-one million, five hundred fifty-six thousand, eight hundred sixty".