16217223078342 has 128 divisors (see below), whose sum is σ = 40458661125120. Its totient is φ = 4257551831040.

The previous prime is 16217223078319. The next prime is 16217223078347. The reversal of 16217223078342 is 24387032271261.

It is a junction number, because it is equal to n+sod(n) for n = 16217223078291 and 16217223078300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16217223078347) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3687858 + ... + 6784890.

It is an arithmetic number, because the mean of its divisors is an integer number (316083290040).

Almost surely, 2^{16217223078342} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16217223078342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20229330562560).

16217223078342 is an abundant number, since it is smaller than the sum of its proper divisors (24241438046778).

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

16217223078342 is a wasteful number, since it uses less digits than its factorization.

16217223078342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097438.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 16217223078342 in words is "sixteen trillion, two hundred seventeen billion, two hundred twenty-three million, seventy-eight thousand, three hundred forty-two".