216611242170 has 128 divisors (see below), whose sum is σ = 536492090880. Its totient is φ = 55947386880.

The previous prime is 216611242123. The next prime is 216611242187. The reversal of 216611242170 is 71242116612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134791507 + ... + 134793113.

It is an arithmetic number, because the mean of its divisors is an integer number (4191344460).

Almost surely, 2^216611242170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216611242170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268246045440).

216611242170 is an abundant number, since it is smaller than the sum of its proper divisors (319880848710).

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

216611242170 is a wasteful number, since it uses less digits than its factorization.

216611242170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760.

The product of its (nonzero) digits is 8064, while the sum is 33.

Adding to 216611242170 its reverse (71242116612), we get a palindrome (287853358782).

The spelling of 216611242170 in words is "two hundred sixteen billion, six hundred eleven million, two hundred forty-two thousand, one hundred seventy".