8065656481 has 3 divisors (see below), whose sum is σ = 8065746291. Its totient is φ = 8065566672.

The previous prime is 8065656479. The next prime is 8065656493. The reversal of 8065656481 is 1846565608.

The square root of 8065656481 is 89809.

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., 7501118881 + 564537600 = 86609^2 + 23760^2 .

It is not a de Polignac number, because 8065656481 - 2¹ = 8065656479 is a prime.

It is a super-2 number, since 2×8065656481² (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 (8065656421) 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, 44905 + ... + 134713.

It is an arithmetic number, because the mean of its divisors is an integer number (2688582097).

Almost surely, 2^8065656481 is an apocalyptic number.

8065656481 is the 89809-th square number.

8065656481 is the 44905-th centered octagonal number.

It is an amenable number.

8065656481 is a deficient number, since it is larger than the sum of its proper divisors (89810).

8065656481 is an frugal number, since it uses more digits than its factorization.

8065656481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179618 (or 89809 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

The cubic root of 8065656481 is about 2005.4564733281.

Multiplying 8065656481 by its sum of digits (49), we get a square (395217167569 = 628663²).

The spelling of 8065656481 in words is "eight billion, sixty-five million, six hundred fifty-six thousand, four hundred eighty-one".