449181931768 has 8 divisors (see below), whose sum is σ = 842216122080. Its totient is φ = 224590965880.

The previous prime is 449181931747. The next prime is 449181931823. The reversal of 449181931768 is 867139181944.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28073870728 + ... + 28073870743.

It is an arithmetic number, because the mean of its divisors is an integer number (105277015260).

Almost surely, 2^449181931768 is an apocalyptic number.

It is an amenable number.

449181931768 is a deficient number, since it is larger than the sum of its proper divisors (393034190312).

449181931768 is a wasteful number, since it uses less digits than its factorization.

449181931768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56147741477 (or 56147741473 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 61.

The spelling of 449181931768 in words is "four hundred forty-nine billion, one hundred eighty-one million, nine hundred thirty-one thousand, seven hundred sixty-eight".