1984786134660 has 384 divisors, whose sum is σ = 7481918976000. Its totient is φ = 426694127616.

The previous prime is 1984786134619. The next prime is 1984786134671. The reversal of 1984786134660 is 664316874891.

It is a happy number.

1984786134660 is a `hidden beast` number, since 1 + 9 + 8 + 4 + 7 + 8 + 613 + 4 + 6 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9883572 + ... + 10082388.

It is an arithmetic number, because the mean of its divisors is an integer number (19484164000).

Almost surely, 2^{1984786134660} is an apocalyptic number.

1984786134660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1984786134660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3740959488000).

1984786134660 is an abundant number, since it is smaller than the sum of its proper divisors (5497132841340).

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

1984786134660 is a wasteful number, since it uses less digits than its factorization.

1984786134660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199000 (or 198992 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 1984786134660 in words is "one trillion, nine hundred eighty-four billion, seven hundred eighty-six million, one hundred thirty-four thousand, six hundred sixty".