216724304794 has 4 divisors (see below), whose sum is σ = 325086457194. Its totient is φ = 108362152396.

The previous prime is 216724304749. The next prime is 216724304807. The reversal of 216724304794 is 497403427612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 198592335769 + 18131969025 = 445637^2 + 134655^2 .

It is a super-2 number, since 2×216724304794² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54181076197 + ... + 54181076200.

Almost surely, 2^216724304794 is an apocalyptic number.

216724304794 is a deficient number, since it is larger than the sum of its proper divisors (108362152400).

216724304794 is a wasteful number, since it uses less digits than its factorization.

216724304794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108362152399.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 216724304794 in words is "two hundred sixteen billion, seven hundred twenty-four million, three hundred four thousand, seven hundred ninety-four".