211865850000 has 720 divisors, whose sum is σ = 856521679104. Its totient is φ = 47882880000.

The previous prime is 211865849981. The next prime is 211865850059. The reversal of 211865850000 is 58568112.

211865850000 is a `hidden beast` number, since 21 + 1 + 86 + 58 + 500 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 324449674 + ... + 324450326.

Almost surely, 2^211865850000 is an apocalyptic number.

211865850000 is a gapful number since it is divisible by the number (20) 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 211865850000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428260839552).

211865850000 is an abundant number, since it is smaller than the sum of its proper divisors (644655829104).

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

211865850000 is a wasteful number, since it uses less digits than its factorization.

211865850000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The spelling of 211865850000 in words is "two hundred eleven billion, eight hundred sixty-five million, eight hundred fifty thousand".