216116645601 has 8 divisors (see below), whose sum is σ = 288158823040. Its totient is φ = 144076115952.

The previous prime is 216116645497. The next prime is 216116645609. The reversal of 216116645601 is 106546611612.

It is a happy number.

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

It is not a de Polignac number, because 216116645601 - 2⁷ = 216116645473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216116645601.

It is not an unprimeable number, because it can be changed into a prime (216116645609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63910 + ... + 660543.

It is an arithmetic number, because the mean of its divisors is an integer number (36019852880).

Almost surely, 2^216116645601 is an apocalyptic number.

It is an amenable number.

216116645601 is a deficient number, since it is larger than the sum of its proper divisors (72042177439).

216116645601 is an equidigital number, since it uses as much as digits as its factorization.

216116645601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823895.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 216116645601 in words is "two hundred sixteen billion, one hundred sixteen million, six hundred forty-five thousand, six hundred one".