7961243217886 has 16 divisors (see below), whose sum is σ = 13647895326720. Its totient is φ = 3411948926520.

The previous prime is 7961243217883. The next prime is 7961243217901. The reversal of 7961243217886 is 6887123421697.

It is a super-3 number, since 3×7961243217886³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7961243217883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3672451 + ... + 5423041.

It is an arithmetic number, because the mean of its divisors is an integer number (852993457920).

Almost surely, 2^{7961243217886} is an apocalyptic number.

7961243217886 is a deficient number, since it is larger than the sum of its proper divisors (5686652108834).

7961243217886 is a wasteful number, since it uses less digits than its factorization.

7961243217886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075439.

The product of its digits is 48771072, while the sum is 64.

The spelling of 7961243217886 in words is "seven trillion, nine hundred sixty-one billion, two hundred forty-three million, two hundred seventeen thousand, eight hundred eighty-six".