4438915649640 has 128 divisors (see below), whose sum is σ = 14839027632000. Its totient is φ = 1180299469824.

The previous prime is 4438915649611. The next prime is 4438915649647. The reversal of 4438915649640 is 469465198344.

It is a happy number.

4438915649640 is a `hidden beast` number, since 4 + 4 + 3 + 8 + 9 + 1 + 564 + 9 + 64 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (4438915649647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5547585 + ... + 6297104.

It is an arithmetic number, because the mean of its divisors is an integer number (115929903375).

Almost surely, 2^{4438915649640} is an apocalyptic number.

4438915649640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4438915649640 is an abundant number, since it is smaller than the sum of its proper divisors (10400111982360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4438915649640 is a wasteful number, since it uses less digits than its factorization.

4438915649640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11845056 (or 11845046 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 63.

The spelling of 4438915649640 in words is "four trillion, four hundred thirty-eight billion, nine hundred fifteen million, six hundred forty-nine thousand, six hundred forty".