220999618560 has 416 divisors, whose sum is σ = 811177926912. Its totient is φ = 50323783680.

The previous prime is 220999618487. The next prime is 220999618577. The reversal of 220999618560 is 65816999022.

It is a self number, because there is not a number n which added to its sum of digits gives 220999618560.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136334550 + ... + 136336170.

Almost surely, 2^220999618560 is an apocalyptic number.

220999618560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220999618560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405588963456).

220999618560 is an abundant number, since it is smaller than the sum of its proper divisors (590178308352).

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

220999618560 is a wasteful number, since it uses less digits than its factorization.

220999618560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977 (or 1955 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 57.

The spelling of 220999618560 in words is "two hundred twenty billion, nine hundred ninety-nine million, six hundred eighteen thousand, five hundred sixty".