8064784681 has 2 divisors, whose sum is σ = 8064784682. Its totient is φ = 8064784680.

The previous prime is 8064784639. The next prime is 8064784711. The reversal of 8064784681 is 1864874608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8024576400 + 40208281 = 89580^2 + 6341^2 .

It is a cyclic number.

It is not a de Polignac number, because 8064784681 - 2¹⁷ = 8064653609 is a prime.

It is a super-2 number, since 2×8064784681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8064784181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4032392340 + 4032392341.

It is an arithmetic number, because the mean of its divisors is an integer number (4032392341).

Almost surely, 2^8064784681 is an apocalyptic number.

It is an amenable number.

8064784681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8064784681 is an equidigital number, since it uses as much as digits as its factorization.

8064784681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2064384, while the sum is 52.

The square root of 8064784681 is about 89804.1462350152. The cubic root of 8064784681 is about 2005.3842155210.

The spelling of 8064784681 in words is "eight billion, sixty-four million, seven hundred eighty-four thousand, six hundred eighty-one".