421855446016 has 33 divisors (see below), whose sum is σ = 843340473829. Its totient is φ = 210917330944.

The previous prime is 421855445899. The next prime is 421855446037. The reversal of 421855446016 is 610644558124.

The square root of 421855446016 is 649504.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 201421440000 + 220434006016 = 448800^2 + 469504^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20773980 + ... + 20794276.

Almost surely, 2^421855446016 is an apocalyptic number.

421855446016 is the 649504-th square number.

It is an amenable number.

421855446016 is a deficient number, since it is larger than the sum of its proper divisors (421485027813).

421855446016 is an frugal number, since it uses more digits than its factorization.

421855446016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40614 (or 20299 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 421855446016 in words is "four hundred twenty-one billion, eight hundred fifty-five million, four hundred forty-six thousand, sixteen".