9964143755986 has 32 divisors (see below), whose sum is σ = 17545660439040. Its totient is φ = 4155329927616.

The previous prime is 9964143755983. The next prime is 9964143756031. The reversal of 9964143755986 is 6895573414699.

It is not an unprimeable number, because it can be changed into a prime (9964143755983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43652281 + ... + 43879948.

It is an arithmetic number, because the mean of its divisors is an integer number (548301888720).

Almost surely, 2^{9964143755986} is an apocalyptic number.

9964143755986 is a deficient number, since it is larger than the sum of its proper divisors (7581516683054).

9964143755986 is a wasteful number, since it uses less digits than its factorization.

9964143755986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87532458.

The product of its digits is 1763596800, while the sum is 76.

It can be divided in two parts, 996414 and 3755986, that added together give a square (4752400 = 2180²).

The spelling of 9964143755986 in words is "nine trillion, nine hundred sixty-four billion, one hundred forty-three million, seven hundred fifty-five thousand, nine hundred eighty-six".