78650793643 has 2 divisors, whose sum is σ = 78650793644. Its totient is φ = 78650793642.

The previous prime is 78650793631. The next prime is 78650793659. The reversal of 78650793643 is 34639705687.

It is a weak prime.

It is an emirp because it is prime and its reverse (34639705687) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78650793643 is a prime.

It is a super-3 number, since 3×78650793643³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (78650793673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39325396821 + 39325396822.

It is an arithmetic number, because the mean of its divisors is an integer number (39325396822).

Almost surely, 2^78650793643 is an apocalyptic number.

78650793643 is a deficient number, since it is larger than the sum of its proper divisors (1).

78650793643 is an equidigital number, since it uses as much as digits as its factorization.

78650793643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22861440, while the sum is 58.

The spelling of 78650793643 in words is "seventy-eight billion, six hundred fifty million, seven hundred ninety-three thousand, six hundred forty-three".