987891887136 has 96 divisors (see below), whose sum is σ = 3233100745728. Its totient is φ = 256595293440.

The previous prime is 987891887039. The next prime is 987891887149. The reversal of 987891887136 is 631788198789.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 66814300 + ... + 66829083.

It is an arithmetic number, because the mean of its divisors is an integer number (33678132768).

Almost surely, 2^987891887136 is an apocalyptic number.

987891887136 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

987891887136 is an abundant number, since it is smaller than the sum of its proper divisors (2245208858592).

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

987891887136 is a wasteful number, since it uses less digits than its factorization.

987891887136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133643414 (or 133643406 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 75.

The spelling of 987891887136 in words is "nine hundred eighty-seven billion, eight hundred ninety-one million, eight hundred eighty-seven thousand, one hundred thirty-six".