16611220315 has 8 divisors (see below), whose sum is σ = 20419646688. Its totient is φ = 12964854720.

The previous prime is 16611220309. The next prime is 16611220357. The reversal of 16611220315 is 51302211661.

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

It is not a de Polignac number, because 16611220315 - 2⁷ = 16611220187 is a prime.

It is a super-3 number, since 3×16611220315³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40514967 + ... + 40515376.

It is an arithmetic number, because the mean of its divisors is an integer number (2552455836).

Almost surely, 2^16611220315 is an apocalyptic number.

16611220315 is a deficient number, since it is larger than the sum of its proper divisors (3808426373).

16611220315 is an equidigital number, since it uses as much as digits as its factorization.

16611220315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81030389.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 16611220315 its reverse (51302211661), we get a palindrome (67913431976).

The spelling of 16611220315 in words is "sixteen billion, six hundred eleven million, two hundred twenty thousand, three hundred fifteen".