216171206046 has 24 divisors (see below), whose sum is σ = 474013973160. Its totient is φ = 71188910736.

The previous prime is 216171206023. The next prime is 216171206057. The reversal of 216171206046 is 640602171612.

216171206046 is a `hidden beast` number, since 2 + 16 + 17 + 1 + 20 + 604 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 216171206046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72344961 + ... + 72347948.

It is an arithmetic number, because the mean of its divisors is an integer number (19750582215).

Almost surely, 2^216171206046 is an apocalyptic number.

216171206046 is an abundant number, since it is smaller than the sum of its proper divisors (257842767114).

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

216171206046 is a wasteful number, since it uses less digits than its factorization.

216171206046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144693000 (or 144692997 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Adding to 216171206046 its reverse (640602171612), we get a palindrome (856773377658).

The spelling of 216171206046 in words is "two hundred sixteen billion, one hundred seventy-one million, two hundred six thousand, forty-six".