211834775908 has 144 divisors (see below), whose sum is σ = 469274050560. Its totient is φ = 83109499200.

The previous prime is 211834775797. The next prime is 211834775923. The reversal of 211834775908 is 809577438112.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135184141 + ... + 135185707.

Almost surely, 2^211834775908 is an apocalyptic number.

211834775908 is a gapful number since it is divisible by the number (28) 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 211834775908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234637025280).

211834775908 is an abundant number, since it is smaller than the sum of its proper divisors (257439274652).

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

211834775908 is a wasteful number, since it uses less digits than its factorization.

211834775908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806 (or 2797 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 211834775908 in words is "two hundred eleven billion, eight hundred thirty-four million, seven hundred seventy-five thousand, nine hundred eight".