211348851780 has 96 divisors (see below), whose sum is σ = 646573777920. Its totient is φ = 51156791680.

The previous prime is 211348851743. The next prime is 211348851787. The reversal of 211348851780 is 87158843112.

It is not an unprimeable number, because it can be changed into a prime (211348851787) 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, 179551 + ... + 674489.

It is an arithmetic number, because the mean of its divisors is an integer number (6735143520).

Almost surely, 2^211348851780 is an apocalyptic number.

211348851780 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 211348851780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323286888960).

211348851780 is an abundant number, since it is smaller than the sum of its proper divisors (435224926140).

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

211348851780 is a wasteful number, since it uses less digits than its factorization.

211348851780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495609 (or 495607 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 48.

The spelling of 211348851780 in words is "two hundred eleven billion, three hundred forty-eight million, eight hundred fifty-one thousand, seven hundred eighty".