7865793643643 has 16 divisors (see below), whose sum is σ = 8614939388160. Its totient is φ = 7137676488096.

The previous prime is 7865793643507. The next prime is 7865793643663. The reversal of 7865793643643 is 3463463975687.

It is a cyclic number.

It is not a de Polignac number, because 7865793643643 - 2¹² = 7865793639547 is a prime.

It is a super-2 number, since 2×7865793643643² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7865793643663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8847653 + ... + 9696006.

It is an arithmetic number, because the mean of its divisors is an integer number (538433711760).

Almost surely, 2^{7865793643643} is an apocalyptic number.

7865793643643 is a deficient number, since it is larger than the sum of its proper divisors (749145744517).

7865793643643 is a wasteful number, since it uses less digits than its factorization.

7865793643643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18544226.

The product of its digits is 1646023680, while the sum is 71.

The spelling of 7865793643643 in words is "seven trillion, eight hundred sixty-five billion, seven hundred ninety-three million, six hundred forty-three thousand, six hundred forty-three".