3990441716881 has 9 divisors (see below), whose sum is σ = 4123382016873. Its totient is φ = 3861657862260.

The previous prime is 3990441716857. The next prime is 3990441716903. The reversal of 3990441716881 is 1886171440993.

The square root of 3990441716881 is 1997609.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-3990441716881 is a prime.

It is a super-2 number, since 2×3990441716881² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3990441714881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 61893660 + ... + 61958098.

Almost surely, 2^{3990441716881} is an apocalyptic number.

3990441716881 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3990441716881 is the 1997609-th square number.

3990441716881 is the 998805-th centered octagonal number.

It is an amenable number.

3990441716881 is a deficient number, since it is larger than the sum of its proper divisors (132940299992).

3990441716881 is an frugal number, since it uses more digits than its factorization.

3990441716881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128940 (or 64470 counting only the distinct ones).

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

The spelling of 3990441716881 in words is "three trillion, nine hundred ninety billion, four hundred forty-one million, seven hundred sixteen thousand, eight hundred eighty-one".