448344355421 has 4 divisors (see below), whose sum is σ = 459279583644. Its totient is φ = 437409127200.

The previous prime is 448344355411. The next prime is 448344355453. The reversal of 448344355421 is 124553443844.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 248726625625 + 199617729796 = 498725^2 + 446786^2 .

It is a cyclic number.

It is not a de Polignac number, because 448344355421 - 2¹⁰ = 448344354397 is a prime.

It is a super-2 number, since 2×448344355421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448344355411) 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, 5467614050 + ... + 5467614131.

It is an arithmetic number, because the mean of its divisors is an integer number (114819895911).

Almost surely, 2^448344355421 is an apocalyptic number.

448344355421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

448344355421 is a deficient number, since it is larger than the sum of its proper divisors (10935228223).

448344355421 is a wasteful number, since it uses less digits than its factorization.

448344355421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10935228222.

The product of its digits is 3686400, while the sum is 47.

The spelling of 448344355421 in words is "four hundred forty-eight billion, three hundred forty-four million, three hundred fifty-five thousand, four hundred twenty-one".