7813905774643 has 2 divisors, whose sum is σ = 7813905774644. Its totient is φ = 7813905774642.

The previous prime is 7813905774637. The next prime is 7813905774667. The reversal of 7813905774643 is 3464775093187.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3464775093187) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7813905774643 is a prime.

It is a super-2 number, since 2×7813905774643² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7813905774613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3906952887321 + 3906952887322.

It is an arithmetic number, because the mean of its divisors is an integer number (3906952887322).

Almost surely, 2^{7813905774643} is an apocalyptic number.

7813905774643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7813905774643 is an equidigital number, since it uses as much as digits as its factorization.

7813905774643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 106686720, while the sum is 64.

The spelling of 7813905774643 in words is "seven trillion, eight hundred thirteen billion, nine hundred five million, seven hundred seventy-four thousand, six hundred forty-three".