218011224064 has 48 divisors (see below), whose sum is σ = 450947706300. Its totient is φ = 105246769152.

The previous prime is 218011224047. The next prime is 218011224103. The reversal of 218011224064 is 460422110812.

It can be written as a sum of positive squares in 2 ways, for example, as 202284057600 + 15727166464 = 449760^2 + 125408^2 .

It is a super-2 number, since 2×218011224064² (a number of 23 digits) contains 22 as substring.

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, 1775967 + ... + 1894750.

Almost surely, 2^218011224064 is an apocalyptic number.

It is an amenable number.

218011224064 is an abundant number, since it is smaller than the sum of its proper divisors (232936482236).

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

218011224064 is an equidigital number, since it uses as much as digits as its factorization.

218011224064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670768 (or 3670748 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

Adding to 218011224064 its reverse (460422110812), we get a palindrome (678433334876).

The spelling of 218011224064 in words is "two hundred eighteen billion, eleven million, two hundred twenty-four thousand, sixty-four".