9776467681 has 2 divisors, whose sum is σ = 9776467682. Its totient is φ = 9776467680.

The previous prime is 9776467643. The next prime is 9776467691. The reversal of 9776467681 is 1867646779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7415965456 + 2360502225 = 86116^2 + 48585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9776467681 is a prime.

It is a super-2 number, since 2×9776467681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9776467691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4888233840 + 4888233841.

It is an arithmetic number, because the mean of its divisors is an integer number (4888233841).

Almost surely, 2^9776467681 is an apocalyptic number.

It is an amenable number.

9776467681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9776467681 is an equidigital number, since it uses as much as digits as its factorization.

9776467681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 61.

The square root of 9776467681 is about 98876.0217696889. The cubic root of 9776467681 is about 2138.2607116317.

The spelling of 9776467681 in words is "nine billion, seven hundred seventy-six million, four hundred sixty-seven thousand, six hundred eighty-one".