1981333982113 has 8 divisors (see below), whose sum is σ = 2046297427200. Its totient is φ = 1916436127440.

The previous prime is 1981333982083. The next prime is 1981333982123. The reversal of 1981333982113 is 3112893331891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1981333982113 is a prime.

It is a super-3 number, since 3×1981333982113³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1981333982123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16336195 + ... + 16457032.

It is an arithmetic number, because the mean of its divisors is an integer number (255787178400).

Almost surely, 2^{1981333982113} is an apocalyptic number.

It is an amenable number.

1981333982113 is a deficient number, since it is larger than the sum of its proper divisors (64963445087).

1981333982113 is a wasteful number, since it uses less digits than its factorization.

1981333982113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32795207.

The product of its digits is 839808, while the sum is 52.

The spelling of 1981333982113 in words is "one trillion, nine hundred eighty-one billion, three hundred thirty-three million, nine hundred eighty-two thousand, one hundred thirteen".