216809741586944 has 40 divisors (see below), whose sum is σ = 472577483627568. Its totient is φ = 98549882536960.

The previous prime is 216809741586937. The next prime is 216809741586989. The reversal of 216809741586944 is 449685147908612.

It is a happy number.

It is a super-2 number, since 2×216809741586944² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19248018302 + ... + 19248029565.

Almost surely, 2^{216809741586944} is an apocalyptic number.

It is an amenable number.

216809741586944 is an abundant number, since it is smaller than the sum of its proper divisors (255767742040624).

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

216809741586944 is an equidigital number, since it uses as much as digits as its factorization.

216809741586944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38496047896 (or 38496047880 counting only the distinct ones).

The product of its (nonzero) digits is 836075520, while the sum is 74.

The spelling of 216809741586944 in words is "two hundred sixteen trillion, eight hundred nine billion, seven hundred forty-one million, five hundred eighty-six thousand, nine hundred forty-four".