216209978495472 has 160 divisors (see below), whose sum is σ = 602706705427008. Its totient is φ = 66393620840448.

The previous prime is 216209978495453. The next prime is 216209978495473. The reversal of 216209978495472 is 274594879902612.

It is a junction number, because it is equal to n+sod(n) for n = 216209978495394 and 216209978495403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216209978495473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 630044128 + ... + 630387200.

Almost surely, 2^{216209978495472} 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 216209978495472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301353352713504).

216209978495472 is an abundant number, since it is smaller than the sum of its proper divisors (386496726931536).

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

216209978495472 is a wasteful number, since it uses less digits than its factorization.

216209978495472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345107 (or 345101 counting only the distinct ones).

The product of its (nonzero) digits is 1097349120, while the sum is 75.

The spelling of 216209978495472 in words is "two hundred sixteen trillion, two hundred nine billion, nine hundred seventy-eight million, four hundred ninety-five thousand, four hundred seventy-two".