448371878781 has 8 divisors (see below), whose sum is σ = 600833339200. Its totient is φ = 297412502112.

The previous prime is 448371878777. The next prime is 448371878789. The reversal of 448371878781 is 187878173844.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 448371878781 - 2² = 448371878777 is a prime.

It is a super-2 number, since 2×448371878781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (448371878789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375520240 + ... + 375521433.

It is an arithmetic number, because the mean of its divisors is an integer number (75104167400).

Almost surely, 2^448371878781 is an apocalyptic number.

It is an amenable number.

448371878781 is a deficient number, since it is larger than the sum of its proper divisors (152461460419).

448371878781 is a wasteful number, since it uses less digits than its factorization.

448371878781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751041875.

The product of its digits is 67436544, while the sum is 66.

The spelling of 448371878781 in words is "four hundred forty-eight billion, three hundred seventy-one million, eight hundred seventy-eight thousand, seven hundred eighty-one".