1986736840704 has 1792 divisors, whose sum is σ = 7827100139520. Its totient is φ = 483065856000.

The previous prime is 1986736840703. The next prime is 1986736840733. The reversal of 1986736840704 is 4070486376891.

1986736840704 is a `hidden beast` number, since 198 + 6 + 7 + 36 + 8 + 407 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (1792).

It is a super-2 number, since 2×1986736840704² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986736840703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 27982208989 + ... + 27982209059.

Almost surely, 2^{1986736840704} is an apocalyptic number.

1986736840704 is a gapful number since it is divisible by the number (14) 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 1986736840704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3913550069760).

1986736840704 is an abundant number, since it is smaller than the sum of its proper divisors (5840363298816).

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

1986736840704 is a wasteful number, since it uses less digits than its factorization.

1986736840704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 1986736840704 in words is "one trillion, nine hundred eighty-six billion, seven hundred thirty-six million, eight hundred forty thousand, seven hundred four".