16818647353 has 8 divisors (see below), whose sum is σ = 17558224200. Its totient is φ = 16089712128.

The previous prime is 16818647333. The next prime is 16818647371. The reversal of 16818647353 is 35374681861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 325153024 + 16493494329 = 18032^2 + 128427^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16818647353 - 2¹³ = 16818639161 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 16818647353.

It is not an unprimeable number, because it can be changed into a prime (16818647333) 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, 2657176 + ... + 2663497.

It is an arithmetic number, because the mean of its divisors is an integer number (2194778025).

Almost surely, 2^16818647353 is an apocalyptic number.

It is an amenable number.

16818647353 is a deficient number, since it is larger than the sum of its proper divisors (739576847).

16818647353 is a wasteful number, since it uses less digits than its factorization.

16818647353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5320811.

The product of its digits is 2903040, while the sum is 52.

The spelling of 16818647353 in words is "sixteen billion, eight hundred eighteen million, six hundred forty-seven thousand, three hundred fifty-three".