8281611972841 has 3 divisors (see below), whose sum is σ = 8281614850621. Its totient is φ = 8281609095062.

The previous prime is 8281611972839. The next prime is 8281611972857. The reversal of 8281611972841 is 1482791161828.

It is a happy number.

The square root of 8281611972841 is 2877779.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 8281611972841 - 2¹ = 8281611972839 is a prime.

It is a super-2 number, since 2×8281611972841² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8281611972041) 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 2 ways as a sum of consecutive naturals, for example, 1438890 + ... + 4316668.

Almost surely, 2^{8281611972841} is an apocalyptic number.

8281611972841 is the 2877779-th square number.

8281611972841 is the 1438890-th centered octagonal number.

It is an amenable number.

8281611972841 is a deficient number, since it is larger than the sum of its proper divisors (2877780).

8281611972841 is an frugal number, since it uses more digits than its factorization.

8281611972841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5755558 (or 2877779 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 58.

The spelling of 8281611972841 in words is "eight trillion, two hundred eighty-one billion, six hundred eleven million, nine hundred seventy-two thousand, eight hundred forty-one".