401443891216 has 45 divisors (see below), whose sum is σ = 783729748893. Its totient is φ = 199202582400.

The previous prime is 401443891193. The next prime is 401443891241. The reversal of 401443891216 is 612198344104.

The square root of 401443891216 is 633596.

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., 364086732816 + 37357158400 = 603396^2 + 193280^2 .

It is a super-2 number, since 2×401443891216² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 382691460 + ... + 382692508.

Almost surely, 2^401443891216 is an apocalyptic number.

401443891216 is the 633596-th square number.

It is an amenable number.

401443891216 is a deficient number, since it is larger than the sum of its proper divisors (382285857677).

401443891216 is an frugal number, since it uses more digits than its factorization.

401443891216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 401443891216 in words is "four hundred one billion, four hundred forty-three million, eight hundred ninety-one thousand, two hundred sixteen".