216288244624 has 45 divisors (see below), whose sum is σ = 421709833713. Its totient is φ = 107464192896.

The previous prime is 216288244603. The next prime is 216288244633. The reversal of 216288244624 is 426442882612.

The square root of 216288244624 is 465068.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 43923776400 + 172364468224 = 209580^2 + 415168^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 433443127 + ... + 433443625.

Almost surely, 2^216288244624 is an apocalyptic number.

216288244624 is the 465068-th square number.

It is an amenable number.

216288244624 is a deficient number, since it is larger than the sum of its proper divisors (205421589089).

216288244624 is an frugal number, since it uses more digits than its factorization.

216288244624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472 (or 734 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 49.

Multiplying 216288244624 by its sum of digits (49), we get a square (10598123986576 = 3255476²).

The spelling of 216288244624 in words is "two hundred sixteen billion, two hundred eighty-eight million, two hundred forty-four thousand, six hundred twenty-four".