16018663440 has 320 divisors, whose sum is σ = 57563315712. Its totient is φ = 3649536000.

The previous prime is 16018663417. The next prime is 16018663459. The reversal of 16018663440 is 4436681061.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3232965 + ... + 3237915.

Almost surely, 2^16018663440 is an apocalyptic number.

16018663440 is a gapful number since it is divisible by the number (10) 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 16018663440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28781657856).

16018663440 is an abundant number, since it is smaller than the sum of its proper divisors (41544652272).

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

16018663440 is a wasteful number, since it uses less digits than its factorization.

16018663440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5058 (or 5052 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 16018663440 in words is "sixteen billion, eighteen million, six hundred sixty-three thousand, four hundred forty".