16404564344 has 64 divisors (see below), whose sum is σ = 36755389440. Its totient is φ = 6711217920.

The previous prime is 16404564313. The next prime is 16404564353. The reversal of 16404564344 is 44346540461.

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, 635204 + ... + 660524.

It is an arithmetic number, because the mean of its divisors is an integer number (574302960).

Almost surely, 2^16404564344 is an apocalyptic number.

16404564344 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 16404564344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18377694720).

16404564344 is an abundant number, since it is smaller than the sum of its proper divisors (20350825096).

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

16404564344 is a wasteful number, since it uses less digits than its factorization.

16404564344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25860 (or 25856 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 41.

The spelling of 16404564344 in words is "sixteen billion, four hundred four million, five hundred sixty-four thousand, three hundred forty-four".