220644863450 has 48 divisors (see below), whose sum is σ = 471272113440. Its totient is φ = 76011624000.

The previous prime is 220644863437. The next prime is 220644863503. The reversal of 220644863450 is 54368446022.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10546721 + ... + 10567620.

It is an arithmetic number, because the mean of its divisors is an integer number (9818169030).

Almost surely, 2^220644863450 is an apocalyptic number.

220644863450 is an abundant number, since it is smaller than the sum of its proper divisors (250627249990).

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

220644863450 is a wasteful number, since it uses less digits than its factorization.

220644863450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21114383 (or 21114378 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 44.

The spelling of 220644863450 in words is "two hundred twenty billion, six hundred forty-four million, eight hundred sixty-three thousand, four hundred fifty".