16218476544 has 156 divisors (see below), whose sum is σ = 45947447264. Its totient is φ = 5087035392.

The previous prime is 16218476531. The next prime is 16218476557. The reversal of 16218476544 is 44567481261.

It is an interprime number because it is at equal distance from previous prime (16218476531) and next prime (16218476557).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 16218476493 and 16218476502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3548949 + ... + 3553515.

Almost surely, 2^16218476544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16218476544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22973723632).

16218476544 is an abundant number, since it is smaller than the sum of its proper divisors (29728970720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16218476544 is an equidigital number, since it uses as much as digits as its factorization.

16218476544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628 (or 4589 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The spelling of 16218476544 in words is "sixteen billion, two hundred eighteen million, four hundred seventy-six thousand, five hundred forty-four".