220618016768 has 108 divisors (see below), whose sum is σ = 449927473905. Its totient is φ = 108151504896.

The previous prime is 220618016761. The next prime is 220618016797. The reversal of 220618016768 is 867610816022.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 220043551744 + 574465024 = 469088^2 + 23968^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332128.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220618016761) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2061850571 + ... + 2061850677.

Almost surely, 2^220618016768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220618016768

220618016768 is an abundant number, since it is smaller than the sum of its proper divisors (229309457137).

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

220618016768 is an frugal number, since it uses more digits than its factorization.

220618016768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 220618016768 in words is "two hundred twenty billion, six hundred eighteen million, sixteen thousand, seven hundred sixty-eight".