1987983384156 has 192 divisors, whose sum is σ = 6803793884160. Its totient is φ = 485985208320.

The previous prime is 1987983384109. The next prime is 1987983384181. The reversal of 1987983384156 is 6514833897891.

1987983384156 is a `hidden beast` number, since 1 + 9 + 8 + 7 + 98 + 3 + 384 + 156 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6889665 + ... + 7172408.

It is an arithmetic number, because the mean of its divisors is an integer number (35436426480).

Almost surely, 2^{1987983384156} is an apocalyptic number.

It is an amenable number.

1987983384156 is an abundant number, since it is smaller than the sum of its proper divisors (4815810500004).

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

1987983384156 is a wasteful number, since it uses less digits than its factorization.

1987983384156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14062121 (or 14062113 counting only the distinct ones).

The product of its digits is 313528320, while the sum is 72.

The spelling of 1987983384156 in words is "one trillion, nine hundred eighty-seven billion, nine hundred eighty-three million, three hundred eighty-four thousand, one hundred fifty-six".