1981710795789 has 12 divisors (see below), whose sum is σ = 2902787645472. Its totient is φ = 1302532917000.

The previous prime is 1981710795787. The next prime is 1981710795809. The reversal of 1981710795789 is 9875970171891.

It is not a de Polignac number, because 1981710795789 - 2¹ = 1981710795787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981710795787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1550633787 + ... + 1550635064.

It is an arithmetic number, because the mean of its divisors is an integer number (241898970456).

Almost surely, 2^{1981710795789} is an apocalyptic number.

It is an amenable number.

1981710795789 is a deficient number, since it is larger than the sum of its proper divisors (921076849683).

1981710795789 is a wasteful number, since it uses less digits than its factorization.

1981710795789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101268928 (or 3101268925 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 72.

The spelling of 1981710795789 in words is "one trillion, nine hundred eighty-one billion, seven hundred ten million, seven hundred ninety-five thousand, seven hundred eighty-nine".