16553506400 has 72 divisors (see below), whose sum is σ = 40454520120. Its totient is φ = 6614312960.

The previous prime is 16553506393. The next prime is 16553506421. The reversal of 16553506400 is 460535561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 771011 + ... + 792189.

It is an arithmetic number, because the mean of its divisors is an integer number (561868335).

Almost surely, 2^16553506400 is an apocalyptic number.

16553506400 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 16553506400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20227260060).

16553506400 is an abundant number, since it is smaller than the sum of its proper divisors (23901013720).

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

16553506400 is a wasteful number, since it uses less digits than its factorization.

16553506400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22176 (or 22163 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 16553506400 in words is "sixteen billion, five hundred fifty-three million, five hundred six thousand, four hundred".