87781336500 has 192 divisors, whose sum is σ = 300308666112. Its totient is φ = 19643328000.

The previous prime is 87781336477. The next prime is 87781336519. The reversal of 87781336500 is 563318778.

It is a self number, because there is not a number n which added to its sum of digits gives 87781336500.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 9882 + ... + 419118.

It is an arithmetic number, because the mean of its divisors is an integer number (1564107636).

Almost surely, 2^87781336500 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 87781336500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150154333056).

87781336500 is an abundant number, since it is smaller than the sum of its proper divisors (212527329612).

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

87781336500 is a wasteful number, since it uses less digits than its factorization.

87781336500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409283 (or 409271 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 87781336500 in words is "eighty-seven billion, seven hundred eighty-one million, three hundred thirty-six thousand, five hundred".