7643768616659 has 12 divisors (see below), whose sum is σ = 8895705813504. Its totient is φ = 6548872743504.

The previous prime is 7643768616641. The next prime is 7643768616677. The reversal of 7643768616659 is 9566168673467.

It is an interprime number because it is at equal distance from previous prime (7643768616641) and next prime (7643768616677).

It is not a de Polignac number, because 7643768616659 - 2¹⁶ = 7643768551123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7643768616059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34757459 + ... + 34976684.

It is an arithmetic number, because the mean of its divisors is an integer number (741308817792).

Almost surely, 2^{7643768616659} is an apocalyptic number.

7643768616659 is a deficient number, since it is larger than the sum of its proper divisors (1251937196845).

7643768616659 is a wasteful number, since it uses less digits than its factorization.

7643768616659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69736394 (or 69736387 counting only the distinct ones).

The product of its digits is 1646023680, while the sum is 74.

The spelling of 7643768616659 in words is "seven trillion, six hundred forty-three billion, seven hundred sixty-eight million, six hundred sixteen thousand, six hundred fifty-nine".