84788121856 has 27 divisors (see below), whose sum is σ = 169254340311. Its totient is φ = 42391731456.

The previous prime is 84788121763. The next prime is 84788121881. The reversal of 84788121856 is 65812188748.

The square root of 84788121856 is 291184.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84788121856.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4649845 + ... + 4668043.

Almost surely, 2^84788121856 is an apocalyptic number.

84788121856 is the 291184-th square number.

It is an amenable number.

84788121856 is a deficient number, since it is larger than the sum of its proper divisors (84466218455).

84788121856 is an frugal number, since it uses more digits than its factorization.

84788121856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36414 (or 18201 counting only the distinct ones).

The product of its digits is 6881280, while the sum is 58.

The spelling of 84788121856 in words is "eighty-four billion, seven hundred eighty-eight million, one hundred twenty-one thousand, eight hundred fifty-six".