16238444544 has 680 divisors, whose sum is σ = 60900829440. Its totient is φ = 4204265472.

The previous prime is 16238444479. The next prime is 16238444561. The reversal of 16238444544 is 44544483261.

It is a happy number.

16238444544 is a `hidden beast` number, since 1 + 6 + 23 + 84 + 4 + 4 + 544 = 666.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16238444544.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 706019317 + ... + 706019339.

Almost surely, 2^16238444544 is an apocalyptic number.

16238444544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16238444544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30450414720).

16238444544 is an abundant number, since it is smaller than the sum of its proper divisors (44662384896).

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

16238444544 is an frugal number, since it uses more digits than its factorization.

16238444544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 54 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 45.

The spelling of 16238444544 in words is "sixteen billion, two hundred thirty-eight million, four hundred forty-four thousand, five hundred forty-four".