1986361807872 has 176 divisors, whose sum is σ = 5949538358400. Its totient is φ = 584614576128.

The previous prime is 1986361807799. The next prime is 1986361807877. The reversal of 1986361807872 is 2787081636891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986361807877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162747 + ... + 1999802.

Almost surely, 2^{1986361807872} is an apocalyptic number.

1986361807872 is a gapful number since it is divisible by the number (12) 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 1986361807872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2974769179200).

1986361807872 is an abundant number, since it is smaller than the sum of its proper divisors (3963176550528).

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

1986361807872 is a wasteful number, since it uses less digits than its factorization.

1986361807872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162608 (or 2162590 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 66.

The spelling of 1986361807872 in words is "one trillion, nine hundred eighty-six billion, three hundred sixty-one million, eight hundred seven thousand, eight hundred seventy-two".