220999464450 has 270 divisors, whose sum is σ = 628600490859. Its totient is φ = 57568959360.

The previous prime is 220999464407. The next prime is 220999464451. The reversal of 220999464450 is 54464999022.

220999464450 is a `hidden beast` number, since 2 + 20 + 99 + 94 + 6 + 445 + 0 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 20785277241 + 200214187209 = 144171^2 + 447453^2 .

It is a tau number, because it is divible by the number of its divisors (270).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332415.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (220999464451) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 2483140006 + ... + 2483140094.

Almost surely, 2^220999464450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220999464450

220999464450 is an abundant number, since it is smaller than the sum of its proper divisors (407601026409).

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

220999464450 is an frugal number, since it uses more digits than its factorization.

220999464450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 220999464450 in words is "two hundred twenty billion, nine hundred ninety-nine million, four hundred sixty-four thousand, four hundred fifty".