211854338604 has 72 divisors (see below), whose sum is σ = 543698168832. Its totient is φ = 69542091360.

The previous prime is 211854338587. The next prime is 211854338611. The reversal of 211854338604 is 406833458112.

211854338604 is a `hidden beast` number, since 2 + 1 + 1 + 8 + 5 + 4 + 3 + 38 + 604 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 211854338604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2157807 + ... + 2253849.

It is an arithmetic number, because the mean of its divisors is an integer number (7551363456).

Almost surely, 2^211854338604 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 211854338604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271849084416).

211854338604 is an abundant number, since it is smaller than the sum of its proper divisors (331843830228).

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

211854338604 is a wasteful number, since it uses less digits than its factorization.

211854338604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96987 (or 96982 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 211854338604 in words is "two hundred eleven billion, eight hundred fifty-four million, three hundred thirty-eight thousand, six hundred four".