211783881088 has 128 divisors (see below), whose sum is σ = 464143125600. Its totient is φ = 95664291840.

The previous prime is 211783881073. The next prime is 211783881097. The reversal of 211783881088 is 880188387112.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×211783881088² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15906178 + ... + 15919486.

Almost surely, 2^211783881088 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 211783881088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232071562800).

211783881088 is an abundant number, since it is smaller than the sum of its proper divisors (252359244512).

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

211783881088 is a wasteful number, since it uses less digits than its factorization.

211783881088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540 (or 13528 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 55.

The spelling of 211783881088 in words is "two hundred eleven billion, seven hundred eighty-three million, eight hundred eighty-one thousand, eighty-eight".