16641244400 has 120 divisors (see below), whose sum is σ = 43949651328. Its totient is φ = 6004960000.

The previous prime is 16641244397. The next prime is 16641244421. The reversal of 16641244400 is 444214661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 561965 + ... + 590835.

Almost surely, 2^16641244400 is an apocalyptic number.

16641244400 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 16641244400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21974825664).

16641244400 is an abundant number, since it is smaller than the sum of its proper divisors (27308406928).

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

16641244400 is a wasteful number, since it uses less digits than its factorization.

16641244400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29031 (or 29020 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 16641244400 in words is "sixteen billion, six hundred forty-one million, two hundred forty-four thousand, four hundred".