216420845064 has 32 divisors (see below), whose sum is σ = 541065661920. Its totient is φ = 72138475136.

The previous prime is 216420845033. The next prime is 216420845071. The reversal of 216420845064 is 460548024612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156852 + ... + 1330844.

It is an arithmetic number, because the mean of its divisors is an integer number (16908301935).

Almost surely, 2^216420845064 is an apocalyptic number.

216420845064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216420845064 is an abundant number, since it is smaller than the sum of its proper divisors (324644816856).

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

216420845064 is a wasteful number, since it uses less digits than its factorization.

216420845064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225829 (or 225825 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

Adding to 216420845064 its reverse (460548024612), we get a palindrome (676968869676).

The spelling of 216420845064 in words is "two hundred sixteen billion, four hundred twenty million, eight hundred forty-five thousand, sixty-four".