1981707030899 has 8 divisors (see below), whose sum is σ = 2034129827520. Its totient is φ = 1929912052456.

The previous prime is 1981707030859. The next prime is 1981707030917. The reversal of 1981707030899 is 9980307071891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1981707030899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1981707030859) 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 7 ways as a sum of consecutive naturals, for example, 156948149 + ... + 156960774.

It is an arithmetic number, because the mean of its divisors is an integer number (254266228440).

Almost surely, 2^{1981707030899} is an apocalyptic number.

1981707030899 is a deficient number, since it is larger than the sum of its proper divisors (52422796621).

1981707030899 is a wasteful number, since it uses less digits than its factorization.

1981707030899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313909089.

The product of its (nonzero) digits is 6858432, while the sum is 62.

The spelling of 1981707030899 in words is "one trillion, nine hundred eighty-one billion, seven hundred seven million, thirty thousand, eight hundred ninety-nine".