211191439380 has 96 divisors (see below), whose sum is σ = 607539744000. Its totient is φ = 54775618560.

The previous prime is 211191439307. The next prime is 211191439391. The reversal of 211191439380 is 83934191112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6641920 + ... + 6673640.

It is an arithmetic number, because the mean of its divisors is an integer number (6328539000).

Almost surely, 2^211191439380 is an apocalyptic number.

211191439380 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 211191439380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303769872000).

211191439380 is an abundant number, since it is smaller than the sum of its proper divisors (396348304620).

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

211191439380 is a wasteful number, since it uses less digits than its factorization.

211191439380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34769 (or 34767 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 211191439380 in words is "two hundred eleven billion, one hundred ninety-one million, four hundred thirty-nine thousand, three hundred eighty".