16535220544320 has 224 divisors, whose sum is σ = 53104601496960. Its totient is φ = 4358584074240.

The previous prime is 16535220544307. The next prime is 16535220544393. The reversal of 16535220544320 is 2344502253561.

16535220544320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315332824 + ... + 315385256.

Almost surely, 2^{16535220544320} is an apocalyptic number.

16535220544320 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 16535220544320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26552300748480).

16535220544320 is an abundant number, since it is smaller than the sum of its proper divisors (36569380952640).

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

16535220544320 is a wasteful number, since it uses less digits than its factorization.

16535220544320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56233 (or 56223 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 16535220544320 its reverse (2344502253561), we get a palindrome (18879722797881).

The spelling of 16535220544320 in words is "sixteen trillion, five hundred thirty-five billion, two hundred twenty million, five hundred forty-four thousand, three hundred twenty".