987555209232 has 160 divisors (see below), whose sum is σ = 2725149329280. Its totient is φ = 307091865600.

The previous prime is 987555209231. The next prime is 987555209237. The reversal of 987555209232 is 232902555789.

It is not an unprimeable number, because it can be changed into a prime (987555209231) 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 31 ways as a sum of consecutive naturals, for example, 45707232 + ... + 45728832.

It is an arithmetic number, because the mean of its divisors is an integer number (17032183308).

Almost surely, 2^987555209232 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 987555209232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1362574664640).

987555209232 is an abundant number, since it is smaller than the sum of its proper divisors (1737594120048).

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

987555209232 is a wasteful number, since it uses less digits than its factorization.

987555209232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22121 (or 22115 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 57.

The spelling of 987555209232 in words is "nine hundred eighty-seven billion, five hundred fifty-five million, two hundred nine thousand, two hundred thirty-two".