216560823442 has 8 divisors (see below), whose sum is σ = 325270353996. Its totient is φ = 108137372112.

The previous prime is 216560823433. The next prime is 216560823461. The reversal of 216560823442 is 244328065612.

It can be written as a sum of positive squares in 2 ways, for example, as 216495714681 + 65108761 = 465291^2 + 8069^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71517913 + ... + 71520940.

Almost surely, 2^216560823442 is an apocalyptic number.

216560823442 is a deficient number, since it is larger than the sum of its proper divisors (108709530554).

216560823442 is a wasteful number, since it uses less digits than its factorization.

216560823442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143039612.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 216560823442 in words is "two hundred sixteen billion, five hundred sixty million, eight hundred twenty-three thousand, four hundred forty-two".