16331729408 has 80 divisors (see below), whose sum is σ = 33227040000. Its totient is φ = 8018030592.

The previous prime is 16331729399. The next prime is 16331729419. The reversal of 16331729408 is 80492713361.

It is a super-2 number, since 2×16331729408² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8048138 + ... + 8050166.

It is an arithmetic number, because the mean of its divisors is an integer number (415338000).

Almost surely, 2^16331729408 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 16331729408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16613520000).

16331729408 is an abundant number, since it is smaller than the sum of its proper divisors (16895310592).

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

16331729408 is an equidigital number, since it uses as much as digits as its factorization.

16331729408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325 (or 2309 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 16331729408 in words is "sixteen billion, three hundred thirty-one million, seven hundred twenty-nine thousand, four hundred eight".