216635005140 has 24 divisors (see below), whose sum is σ = 606578014560. Its totient is φ = 57769334688.

The previous prime is 216635005127. The next prime is 216635005159. The reversal of 216635005140 is 41500536612.

216635005140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1805291650 + ... + 1805291769.

It is an arithmetic number, because the mean of its divisors is an integer number (25274083940).

Almost surely, 2^216635005140 is an apocalyptic number.

216635005140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216635005140 is an abundant number, since it is smaller than the sum of its proper divisors (389943009420).

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

216635005140 is a wasteful number, since it uses less digits than its factorization.

216635005140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3610583431 (or 3610583429 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 216635005140 in words is "two hundred sixteen billion, six hundred thirty-five million, five thousand, one hundred forty".