84805866720 has 216 divisors, whose sum is σ = 299041528968. Its totient is φ = 21885027840.

The previous prime is 84805866713. The next prime is 84805866763. The reversal of 84805866720 is 2766850848.

84805866720 is a `hidden beast` number, since 8 + 480 + 5 + 86 + 67 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1353199 + ... + 1414481.

It is an arithmetic number, because the mean of its divisors is an integer number (1384451523).

Almost surely, 2^84805866720 is an apocalyptic number.

84805866720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84805866720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149520764484).

84805866720 is an abundant number, since it is smaller than the sum of its proper divisors (214235662248).

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

84805866720 is a wasteful number, since it uses less digits than its factorization.

84805866720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61366 (or 61324 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 84805866720 in words is "eighty-four billion, eight hundred five million, eight hundred sixty-six thousand, seven hundred twenty".