216325331423406 has 128 divisors (see below), whose sum is σ = 519820728422400. Its totient is φ = 66479482460160.

The previous prime is 216325331423323. The next prime is 216325331423431. The reversal of 216325331423406 is 604324133523612.

216325331423406 is a `hidden beast` number, since 2 + 1 + 6 + 32 + 533 + 1 + 42 + 3 + 40 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15577851 + ... + 25986921.

It is an arithmetic number, because the mean of its divisors is an integer number (4061099440800).

Almost surely, 2^{216325331423406} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216325331423406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259910364211200).

216325331423406 is an abundant number, since it is smaller than the sum of its proper divisors (303495396998994).

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

216325331423406 is a wasteful number, since it uses less digits than its factorization.

216325331423406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10409711 (or 10409705 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 45.

The spelling of 216325331423406 in words is "two hundred sixteen trillion, three hundred twenty-five billion, three hundred thirty-one million, four hundred twenty-three thousand, four hundred six".