11871587500000 has 216 divisors, whose sum is σ = 29519422386048. Its totient is φ = 4699200000000.

The previous prime is 11871587499949. The next prime is 11871587500013. The reversal of 11871587500000 is 578517811.

It is a self number, because there is not a number n which added to its sum of digits gives 11871587500000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1212495105 + ... + 1212504895.

It is an arithmetic number, because the mean of its divisors is an integer number (136663992528).

Almost surely, 2^{11871587500000} is an apocalyptic number.

11871587500000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11871587500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14759711193024).

11871587500000 is an abundant number, since it is smaller than the sum of its proper divisors (17647834886048).

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

11871587500000 is an frugal number, since it uses more digits than its factorization.

11871587500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9938 (or 9895 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 43.

The spelling of 11871587500000 in words is "eleven trillion, eight hundred seventy-one billion, five hundred eighty-seven million, five hundred thousand".