211550646480 has 160 divisors (see below), whose sum is σ = 673913783424. Its totient is φ = 54857668608.

The previous prime is 211550646467. The next prime is 211550646487. The reversal of 211550646480 is 84646055112.

It is a super-2 number, since 2×211550646480² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211550646487) 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, 18491322 + ... + 18502758.

Almost surely, 2^211550646480 is an apocalyptic number.

211550646480 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 211550646480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336956891712).

211550646480 is an abundant number, since it is smaller than the sum of its proper divisors (462363136944).

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

211550646480 is a wasteful number, since it uses less digits than its factorization.

211550646480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13573 (or 13567 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 211550646480 in words is "two hundred eleven billion, five hundred fifty million, six hundred forty-six thousand, four hundred eighty".