16454778218 has 8 divisors (see below), whose sum is σ = 24912842112. Its totient is φ = 8150497516.

The previous prime is 16454778217. The next prime is 16454778247. The reversal of 16454778218 is 81287745461.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16454778218.

It is not an unprimeable number, because it can be changed into a prime (16454778217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38445530 + ... + 38445957.

It is an arithmetic number, because the mean of its divisors is an integer number (3114105264).

Almost surely, 2^16454778218 is an apocalyptic number.

16454778218 is a deficient number, since it is larger than the sum of its proper divisors (8458063894).

16454778218 is a wasteful number, since it uses less digits than its factorization.

16454778218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76891596.

The product of its digits is 3010560, while the sum is 53.

The spelling of 16454778218 in words is "sixteen billion, four hundred fifty-four million, seven hundred seventy-eight thousand, two hundred eighteen".