217489073264 has 40 divisors (see below), whose sum is σ = 442055322720. Its totient is φ = 103515910400.

The previous prime is 217489073231. The next prime is 217489073273. The reversal of 217489073264 is 462370984712.

It is a happy number.

217489073264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×217489073264² (a number of 23 digits) contains 22 as substring.

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, 3267947 + ... + 3333834.

It is an arithmetic number, because the mean of its divisors is an integer number (11051383068).

Almost surely, 2^217489073264 is an apocalyptic number.

It is an amenable number.

217489073264 is an abundant number, since it is smaller than the sum of its proper divisors (224566249456).

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

217489073264 is a wasteful number, since it uses less digits than its factorization.

217489073264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6601889 (or 6601883 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 217489073264 in words is "two hundred seventeen billion, four hundred eighty-nine million, seventy-three thousand, two hundred sixty-four".