211113260640 has 144 divisors (see below), whose sum is σ = 720677176128. Its totient is φ = 56277086208.

The previous prime is 211113260623. The next prime is 211113260707. The reversal of 211113260640 is 46062311112.

It is a happy number.

211113260640 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 13 + 2 + 6 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4328872 + ... + 4377368.

It is an arithmetic number, because the mean of its divisors is an integer number (5004702612).

Almost surely, 2^211113260640 is an apocalyptic number.

211113260640 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 211113260640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360338588064).

211113260640 is an abundant number, since it is smaller than the sum of its proper divisors (509563915488).

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

211113260640 is a wasteful number, since it uses less digits than its factorization.

211113260640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51541 (or 51530 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 211113260640 its reverse (46062311112), we get a palindrome (257175571752).

The spelling of 211113260640 in words is "two hundred eleven billion, one hundred thirteen million, two hundred sixty thousand, six hundred forty".