16291321424 has 80 divisors (see below), whose sum is σ = 36368505600. Its totient is φ = 6925132800.

The previous prime is 16291321393. The next prime is 16291321433. The reversal of 16291321424 is 42412319261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11644277 + ... + 11645675.

It is an arithmetic number, because the mean of its divisors is an integer number (454606320).

Almost surely, 2^16291321424 is an apocalyptic number.

16291321424 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 16291321424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18184252800).

16291321424 is an abundant number, since it is smaller than the sum of its proper divisors (20077184176).

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

16291321424 is a wasteful number, since it uses less digits than its factorization.

16291321424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2182 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The spelling of 16291321424 in words is "sixteen billion, two hundred ninety-one million, three hundred twenty-one thousand, four hundred twenty-four".