2081443883841 has 243 divisors, whose sum is σ = 3823601287779. Its totient is φ = 1087788550464.

The previous prime is 2081443883839. The next prime is 2081443883879. The reversal of 2081443883841 is 1483883441802.

The square root of 2081443883841 is 1442721.

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

2081443883841 is a `hidden beast` number, since 2 + 0 + 81 + 443 + 8 + 83 + 8 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1091458683441 + 989985200400 = 1044729^2 + 994980^2 .

It is not a de Polignac number, because 2081443883841 - 2¹ = 2081443883839 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2081443883341) by changing a digit.

It is a polite number, since it can be written in 242 ways as a sum of consecutive naturals, for example, 20208192996 + ... + 20208193098.

Almost surely, 2^{2081443883841} is an apocalyptic number.

2081443883841 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2081443883841 is the 1442721-st square number.

2081443883841 is the 721361-st centered octagonal number.

It is an amenable number.

2081443883841 is a deficient number, since it is larger than the sum of its proper divisors (1742157403938).

2081443883841 is a wasteful number, since it uses less digits than its factorization.

2081443883841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 54.

It can be divided in two parts, 2081443 and 883841, that added together give a square (2965284 = 1722²).

The spelling of 2081443883841 in words is "two trillion, eighty-one billion, four hundred forty-three million, eight hundred eighty-three thousand, eight hundred forty-one".