87663991800 has 1152 divisors, whose sum is σ = 369051379200. Its totient is φ = 16787865600.

The previous prime is 87663991721. The next prime is 87663991819. The reversal of 87663991800 is 819936678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 630676131 + ... + 630676269.

It is an arithmetic number, because the mean of its divisors is an integer number (320357100).

Almost surely, 2^87663991800 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 87663991800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184525689600).

87663991800 is an abundant number, since it is smaller than the sum of its proper divisors (281387387400).

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

87663991800 is a wasteful number, since it uses less digits than its factorization.

87663991800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 87663991800 in words is "eighty-seven billion, six hundred sixty-three million, nine hundred ninety-one thousand, eight hundred".