216580247982 has 80 divisors (see below), whose sum is σ = 555495903072. Its totient is φ = 61783326720.

The previous prime is 216580247971. The next prime is 216580248023. The reversal of 216580247982 is 289742085612.

216580247982 is a `hidden beast` number, since 2 + 16 + 5 + 80 + 2 + 479 + 82 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 577918 + ... + 875870.

Almost surely, 2^216580247982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216580247982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277747951536).

216580247982 is an abundant number, since it is smaller than the sum of its proper divisors (338915655090).

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

216580247982 is a wasteful number, since it uses less digits than its factorization.

216580247982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298615 (or 298606 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 216580247982 in words is "two hundred sixteen billion, five hundred eighty million, two hundred forty-seven thousand, nine hundred eighty-two".