219999387440 has 160 divisors (see below), whose sum is σ = 588519475200. Its totient is φ = 74920108032.

The previous prime is 219999387437. The next prime is 219999387469. The reversal of 219999387440 is 44783999912.

219999387440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82798592 + ... + 82801248.

It is an arithmetic number, because the mean of its divisors is an integer number (3678246720).

Almost surely, 2^219999387440 is an apocalyptic number.

219999387440 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 219999387440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294259737600).

219999387440 is an abundant number, since it is smaller than the sum of its proper divisors (368520087760).

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

219999387440 is a wasteful number, since it uses less digits than its factorization.

219999387440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3619 (or 3613 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 65.

The spelling of 219999387440 in words is "two hundred nineteen billion, nine hundred ninety-nine million, three hundred eighty-seven thousand, four hundred forty".