7883841681 has 27 divisors (see below), whose sum is σ = 12103996593. Its totient is φ = 4943882880.

The previous prime is 7883841619. The next prime is 7883841683. The reversal of 7883841681 is 1861483887.

It is a happy number.

The square root of 7883841681 is 88791.

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

7883841681 is a `hidden beast` number, since 78 + 83 + 8 + 416 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1529201025 + 6354640656 = 39105^2 + 79716^2 .

It is not a de Polignac number, because 7883841681 - 2¹⁵ = 7883808913 is a prime.

It is a super-2 number, since 2×7883841681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7883841683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4527471 + ... + 4529211.

Almost surely, 2^7883841681 is an apocalyptic number.

7883841681 is the 88791-st square number.

7883841681 is the 44396-th centered octagonal number.

It is an amenable number.

7883841681 is a deficient number, since it is larger than the sum of its proper divisors (4220154912).

7883841681 is an equidigital number, since it uses as much as digits as its factorization.

7883841681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 1761 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The cubic root of 7883841681 is about 1990.2729086251.

The spelling of 7883841681 in words is "seven billion, eight hundred eighty-three million, eight hundred forty-one thousand, six hundred eighty-one".