16844654540 has 72 divisors (see below), whose sum is σ = 41278557600. Its totient is φ = 5771624544.

The previous prime is 16844654503. The next prime is 16844654549. The reversal of 16844654540 is 4545644861.

It is a super-2 number, since 2×16844654540² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16844654549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10748837 + ... + 10750403.

It is an arithmetic number, because the mean of its divisors is an integer number (573313300).

Almost surely, 2^16844654540 is an apocalyptic number.

16844654540 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 16844654540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20639278800).

16844654540 is an abundant number, since it is smaller than the sum of its proper divisors (24433903060).

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

16844654540 is an frugal number, since it uses more digits than its factorization.

16844654540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 47.

The spelling of 16844654540 in words is "sixteen billion, eight hundred forty-four million, six hundred fifty-four thousand, five hundred forty".