8421485646 has 48 divisors (see below), whose sum is σ = 19786902480. Its totient is φ = 2382307200.

The previous prime is 8421485623. The next prime is 8421485659. The reversal of 8421485646 is 6465841248.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8421485595 and 8421485604.

It is a congruent 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, 112111 + ... + 171498.

It is an arithmetic number, because the mean of its divisors is an integer number (412227135).

Almost surely, 2^8421485646 is an apocalyptic number.

8421485646 is an abundant number, since it is smaller than the sum of its proper divisors (11365416834).

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

8421485646 is a wasteful number, since it uses less digits than its factorization.

8421485646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283729 (or 283722 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 48.

The square root of 8421485646 is about 91768.6528505241. The cubic root of 8421485646 is about 2034.5244072488.

The spelling of 8421485646 in words is "eight billion, four hundred twenty-one million, four hundred eighty-five thousand, six hundred forty-six".