218650612067616 has 48 divisors (see below), whose sum is σ = 574622929730304. Its totient is φ = 72799083634944.

The previous prime is 218650612067557. The next prime is 218650612067617. The reversal of 218650612067616 is 616760216056812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (218650612067617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1319506111 + ... + 1319671806.

It is an arithmetic number, because the mean of its divisors is an integer number (11971311036048).

Almost surely, 2^{218650612067616} is an apocalyptic number.

It is an amenable number.

218650612067616 is an abundant number, since it is smaller than the sum of its proper divisors (355972317662688).

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

218650612067616 is a wasteful number, since it uses less digits than its factorization.

218650612067616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639178793 (or 2639178785 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 218650612067616 in words is "two hundred eighteen trillion, six hundred fifty billion, six hundred twelve million, sixty-seven thousand, six hundred sixteen".