8421608450 has 24 divisors (see below), whose sum is σ = 16488624720. Its totient is φ = 3191346000.

The previous prime is 8421608449. The next prime is 8421608453. The reversal of 8421608450 is 548061248.

It is a happy number.

It is a super-2 number, since 2×8421608450² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (8421608453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4431476 + ... + 4433375.

It is an arithmetic number, because the mean of its divisors is an integer number (687026030).

Almost surely, 2^8421608450 is an apocalyptic number.

8421608450 is a deficient number, since it is larger than the sum of its proper divisors (8067016270).

8421608450 is a wasteful number, since it uses less digits than its factorization.

8421608450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8864882 (or 8864877 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 8421608450 is about 91769.3219436648. The cubic root of 8421608450 is about 2034.5342964984.

Adding to 8421608450 its reverse (548061248), we get a palindrome (8969669698).

The spelling of 8421608450 in words is "eight billion, four hundred twenty-one million, six hundred eight thousand, four hundred fifty".