4449081939681 has 8 divisors (see below), whose sum is σ = 6015660087744. Its totient is φ = 2924279209040.

The previous prime is 4449081939677. The next prime is 4449081939697. The reversal of 4449081939681 is 1869391809444.

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

It is a cyclic number.

It is not a de Polignac number, because 4449081939681 - 2² = 4449081939677 is a prime.

It is a super-2 number, since 2×4449081939681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4449081939611) 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, 10443854106 + ... + 10443854531.

It is an arithmetic number, because the mean of its divisors is an integer number (751957510968).

Almost surely, 2^{4449081939681} is an apocalyptic number.

It is an amenable number.

4449081939681 is a deficient number, since it is larger than the sum of its proper divisors (1566578148063).

4449081939681 is a wasteful number, since it uses less digits than its factorization.

4449081939681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20887708711.

The product of its (nonzero) digits is 53747712, while the sum is 66.

The spelling of 4449081939681 in words is "four trillion, four hundred forty-nine billion, eighty-one million, nine hundred thirty-nine thousand, six hundred eighty-one".