16450531440 has 320 divisors, whose sum is σ = 62638562304. Its totient is φ = 3485712384.

The previous prime is 16450531439. The next prime is 16450531459. The reversal of 16450531440 is 4413505461.

It is a congruent number.

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, 1909222 + ... + 1917818.

Almost surely, 2^16450531440 is an apocalyptic number.

16450531440 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 16450531440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31319281152).

16450531440 is an abundant number, since it is smaller than the sum of its proper divisors (46188030864).

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

16450531440 is a wasteful number, since it uses less digits than its factorization.

16450531440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8704 (or 8698 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 16450531440 in words is "sixteen billion, four hundred fifty million, five hundred thirty-one thousand, four hundred forty".