8042681761 has 3 divisors (see below), whose sum is σ = 8042771443. Its totient is φ = 8042592080.

The previous prime is 8042681719. The next prime is 8042681771. The reversal of 8042681761 is 1671862408.

The square root of 8042681761 is 89681.

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 can be written as a sum of positive squares in only one way, i.e., 5131000161 + 2911681600 = 71631^2 + 53960^2 .

It is not a de Polignac number, because 8042681761 - 2¹¹ = 8042679713 is a prime.

It is a super-2 number, since 2×8042681761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8042681771) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 44841 + ... + 134521.

Almost surely, 2^8042681761 is an apocalyptic number.

8042681761 is the 89681-st square number.

8042681761 is the 44841-st centered octagonal number.

It is an amenable number.

8042681761 is a deficient number, since it is larger than the sum of its proper divisors (89682).

8042681761 is an frugal number, since it uses more digits than its factorization.

8042681761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179362 (or 89681 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The cubic root of 8042681761 is about 2003.5505066381.

The spelling of 8042681761 in words is "eight billion, forty-two million, six hundred eighty-one thousand, seven hundred sixty-one".