216144353999 has 8 divisors (see below), whose sum is σ = 250148981760. Its totient is φ = 182921441976.

The previous prime is 216144353987. The next prime is 216144354001. The reversal of 216144353999 is 999353441612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216144353999 - 2⁸ = 216144353743 is a prime.

It is a super-3 number, since 3×216144353999³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216144353099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195428339 + ... + 195429444.

It is an arithmetic number, because the mean of its divisors is an integer number (31268622720).

Almost surely, 2^216144353999 is an apocalyptic number.

216144353999 is a deficient number, since it is larger than the sum of its proper divisors (34004627761).

216144353999 is an equidigital number, since it uses as much as digits as its factorization.

216144353999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390857869.

The product of its digits is 6298560, while the sum is 56.

The spelling of 216144353999 in words is "two hundred sixteen billion, one hundred forty-four million, three hundred fifty-three thousand, nine hundred ninety-nine".