216065736664544 has 48 divisors (see below), whose sum is σ = 458120396604528. Its totient is φ = 99718406326272.

The previous prime is 216065736664529. The next prime is 216065736664553. The reversal of 216065736664544 is 445466637560612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1242062 + ... + 20824845.

It is an arithmetic number, because the mean of its divisors is an integer number (9544174929261).

Almost surely, 2^{216065736664544} is an apocalyptic number.

It is an amenable number.

216065736664544 is an abundant number, since it is smaller than the sum of its proper divisors (242054659939984).

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

216065736664544 is a wasteful number, since it uses less digits than its factorization.

216065736664544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22090467 (or 22090459 counting only the distinct ones).

The product of its (nonzero) digits is 522547200, while the sum is 65.

The spelling of 216065736664544 in words is "two hundred sixteen trillion, sixty-five billion, seven hundred thirty-six million, six hundred sixty-four thousand, five hundred forty-four".