216721869438030 has 32 divisors (see below), whose sum is σ = 567417258165888. Its totient is φ = 52538635015200.

The previous prime is 216721869438001. The next prime is 216721869438047. The reversal of 216721869438030 is 30834968127612.

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, 328366468516 + ... + 328366469175.

It is an arithmetic number, because the mean of its divisors is an integer number (17731789317684).

Almost surely, 2^{216721869438030} is an apocalyptic number.

216721869438030 is an abundant number, since it is smaller than the sum of its proper divisors (350695388727858).

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

216721869438030 is a wasteful number, since it uses less digits than its factorization.

216721869438030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656732937712.

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 216721869438030 in words is "two hundred sixteen trillion, seven hundred twenty-one billion, eight hundred sixty-nine million, four hundred thirty-eight thousand, thirty".