211308063616 has 128 divisors (see below), whose sum is σ = 456671658240. Its totient is φ = 96814448640.

The previous prime is 211308063613. The next prime is 211308063643. The reversal of 211308063616 is 616360803112.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211308063613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193327966 + ... + 193329058.

It is an arithmetic number, because the mean of its divisors is an integer number (3567747330).

Almost surely, 2^211308063616 is an apocalyptic number.

211308063616 is a gapful number since it is divisible by the number (26) 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 211308063616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228335829120).

211308063616 is an abundant number, since it is smaller than the sum of its proper divisors (245363594624).

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

211308063616 is a wasteful number, since it uses less digits than its factorization.

211308063616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864 (or 1852 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

Adding to 211308063616 its reverse (616360803112), we get a palindrome (827668866728).

The spelling of 211308063616 in words is "two hundred eleven billion, three hundred eight million, sixty-three thousand, six hundred sixteen".