450221226640 has 20 divisors (see below), whose sum is σ = 1046764352124. Its totient is φ = 180088490624.

The previous prime is 450221226593. The next prime is 450221226649. The reversal of 450221226640 is 46622122054.

It can be written as a sum of positive squares in 2 ways, for example, as 261472686336 + 188748540304 = 511344^2 + 434452^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 450221226596 and 450221226605.

It is not an unprimeable number, because it can be changed into a prime (450221226649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2813882587 + ... + 2813882746.

Almost surely, 2^450221226640 is an apocalyptic number.

450221226640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

450221226640 is an abundant number, since it is smaller than the sum of its proper divisors (596543125484).

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

450221226640 is a wasteful number, since it uses less digits than its factorization.

450221226640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5627765346 (or 5627765340 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 450221226640 its reverse (46622122054), we get a palindrome (496843348694).

The spelling of 450221226640 in words is "four hundred fifty billion, two hundred twenty-one million, two hundred twenty-six thousand, six hundred forty".