7681443841 has 4 divisors (see below), whose sum is σ = 7929232384. Its totient is φ = 7433655300.

The previous prime is 7681443751. The next prime is 7681443901. The reversal of 7681443841 is 1483441867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7681443841 - 2⁷ = 7681443713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7681443791 and 7681443800.

It is not an unprimeable number, because it can be changed into a prime (7681443641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123894225 + ... + 123894286.

It is an arithmetic number, because the mean of its divisors is an integer number (1982308096).

Almost surely, 2^7681443841 is an apocalyptic number.

It is an amenable number.

7681443841 is a deficient number, since it is larger than the sum of its proper divisors (247788543).

7681443841 is a wasteful number, since it uses less digits than its factorization.

7681443841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247788542.

The product of its digits is 516096, while the sum is 46.

The square root of 7681443841 is about 87643.8465666586. The cubic root of 7681443841 is about 1973.0932912347.

The spelling of 7681443841 in words is "seven billion, six hundred eighty-one million, four hundred forty-three thousand, eight hundred forty-one".