211783446940 has 96 divisors (see below), whose sum is σ = 508109220864. Its totient is φ = 73455083520.

The previous prime is 211783446841. The next prime is 211783446943. The reversal of 211783446940 is 49644387112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211783446943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2256837 + ... + 2348803.

It is an arithmetic number, because the mean of its divisors is an integer number (5292804384).

Almost surely, 2^211783446940 is an apocalyptic number.

211783446940 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 211783446940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254054610432).

211783446940 is an abundant number, since it is smaller than the sum of its proper divisors (296325773924).

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

211783446940 is a wasteful number, since it uses less digits than its factorization.

211783446940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92527 (or 92525 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 211783446940 in words is "two hundred eleven billion, seven hundred eighty-three million, four hundred forty-six thousand, nine hundred forty".