8194486777 has 2 divisors, whose sum is σ = 8194486778. Its totient is φ = 8194486776.

The previous prime is 8194486753. The next prime is 8194486787. The reversal of 8194486777 is 7776844918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5246974096 + 2947512681 = 72436^2 + 54291^2 .

It is a cyclic number.

It is not a de Polignac number, because 8194486777 - 2¹¹ = 8194484729 is a prime.

It is a super-2 number, since 2×8194486777² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8194486717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4097243388 + 4097243389.

It is an arithmetic number, because the mean of its divisors is an integer number (4097243389).

Almost surely, 2^8194486777 is an apocalyptic number.

It is an amenable number.

8194486777 is a deficient number, since it is larger than the sum of its proper divisors (1).

8194486777 is an equidigital number, since it uses as much as digits as its factorization.

8194486777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18966528, while the sum is 61.

The square root of 8194486777 is about 90523.4045813567. The cubic root of 8194486777 is about 2016.0776398388.

The spelling of 8194486777 in words is "eight billion, one hundred ninety-four million, four hundred eighty-six thousand, seven hundred seventy-seven".