1986064063344 has 100 divisors (see below), whose sum is σ = 5750668752840. Its totient is φ = 661742282880.

The previous prime is 1986064063337. The next prime is 1986064063369. The reversal of 1986064063344 is 4433604606891.

It is a happy number.

1986064063344 is a `hidden beast` number, since 198 + 6 + 0 + 6 + 406 + 3 + 3 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2763967 + ... + 3407585.

Almost surely, 2^{1986064063344} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1986064063344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2875334376420).

1986064063344 is an abundant number, since it is smaller than the sum of its proper divisors (3764604689496).

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

1986064063344 is a wasteful number, since it uses less digits than its factorization.

1986064063344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646020 (or 646005 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 1986064063344 in words is "one trillion, nine hundred eighty-six billion, sixty-four million, sixty-three thousand, three hundred forty-four".