1984966885980 has 144 divisors (see below), whose sum is σ = 6505077144384. Its totient is φ = 487035970560.

The previous prime is 1984966885963. The next prime is 1984966886003. The reversal of 1984966885980 is 895886694891.

1984966885980 is a `hidden beast` number, since 19 + 8 + 4 + 9 + 6 + 6 + 8 + 8 + 598 + 0 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1984966885980.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 636049 + ... + 2091528.

It is an arithmetic number, because the mean of its divisors is an integer number (45174146836).

Almost surely, 2^{1984966885980} is an apocalyptic number.

1984966885980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1984966885980 is an abundant number, since it is smaller than the sum of its proper divisors (4520110258404).

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

1984966885980 is a wasteful number, since it uses less digits than its factorization.

1984966885980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727916 (or 2727911 counting only the distinct ones).

The product of its (nonzero) digits is 2149908480, while the sum is 81.

The spelling of 1984966885980 in words is "one trillion, nine hundred eighty-four billion, nine hundred sixty-six million, eight hundred eighty-five thousand, nine hundred eighty".