7643768616677 has 2 divisors, whose sum is σ = 7643768616678. Its totient is φ = 7643768616676.

The previous prime is 7643768616641. The next prime is 7643768616683. The reversal of 7643768616677 is 7766168673467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6842038201441 + 801730415236 = 2615729^2 + 895394^2 .

It is an emirp because it is prime and its reverse (7766168673467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7643768616677 - 2¹⁰ = 7643768615653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7643768616877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821884308338 + 3821884308339.

It is an arithmetic number, because the mean of its divisors is an integer number (3821884308339).

Almost surely, 2^{7643768616677} is an apocalyptic number.

It is an amenable number.

7643768616677 is a deficient number, since it is larger than the sum of its proper divisors (1).

7643768616677 is an equidigital number, since it uses as much as digits as its factorization.

7643768616677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792336896, while the sum is 74.

The spelling of 7643768616677 in words is "seven trillion, six hundred forty-three billion, seven hundred sixty-eight million, six hundred sixteen thousand, six hundred seventy-seven".