1982609869940 has 96 divisors (see below), whose sum is σ = 4766175558144. Its totient is φ = 678622556160.

The previous prime is 1982609869913. The next prime is 1982609869979. The reversal of 1982609869940 is 499689062891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 434685260 + ... + 434689820.

It is an arithmetic number, because the mean of its divisors is an integer number (49647662064).

Almost surely, 2^{1982609869940} is an apocalyptic number.

1982609869940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1982609869940 is an abundant number, since it is smaller than the sum of its proper divisors (2783565688204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1982609869940 is a wasteful number, since it uses less digits than its factorization.

1982609869940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9057 (or 9055 counting only the distinct ones).

The product of its (nonzero) digits is 120932352, while the sum is 71.

The spelling of 1982609869940 in words is "one trillion, nine hundred eighty-two billion, six hundred nine million, eight hundred sixty-nine thousand, nine hundred forty".