216548513168 has 20 divisors (see below), whose sum is σ = 451836801948. Its totient is φ = 99945467520.

The previous prime is 216548513149. The next prime is 216548513177. The reversal of 216548513168 is 861315845612.

It can be written as a sum of positive squares in 2 ways, for example, as 54339339664 + 162209173504 = 233108^2 + 402752^2 .

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, 520549103 + ... + 520549518.

Almost surely, 2^216548513168 is an apocalyptic number.

It is an amenable number.

216548513168 is an abundant number, since it is smaller than the sum of its proper divisors (235288288780).

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

216548513168 is a wasteful number, since it uses less digits than its factorization.

216548513168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041098642 (or 1041098636 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 50.

The spelling of 216548513168 in words is "two hundred sixteen billion, five hundred forty-eight million, five hundred thirteen thousand, one hundred sixty-eight".