1982812890789 has 12 divisors (see below), whose sum is σ = 2864140536972. Its totient is φ = 1321839504000.

The previous prime is 1982812890769. The next prime is 1982812890827. The reversal of 1982812890789 is 9870982182891.

1982812890789 is a `hidden beast` number, since 198 + 2 + 81 + 289 + 0 + 7 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 286936992225 + 1695875898564 = 535665^2 + 1302258^2 .

It is not a de Polignac number, because 1982812890789 - 2¹² = 1982812886693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982812890769) 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 11 ways as a sum of consecutive naturals, for example, 2626302 + ... + 3295919.

It is an arithmetic number, because the mean of its divisors is an integer number (238678378081).

Almost surely, 2^{1982812890789} is an apocalyptic number.

It is an amenable number.

1982812890789 is a deficient number, since it is larger than the sum of its proper divisors (881327646183).

1982812890789 is a wasteful number, since it uses less digits than its factorization.

1982812890789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5959428 (or 5959425 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 72.

The spelling of 1982812890789 in words is "one trillion, nine hundred eighty-two billion, eight hundred twelve million, eight hundred ninety thousand, seven hundred eighty-nine".