16500553456530 has 256 divisors, whose sum is σ = 47681300685312. Its totient is φ = 3600715776000.

The previous prime is 16500553456523. The next prime is 16500553456553. The reversal of 16500553456530 is 3565435500561.

It is a self number, because there is not a number n which added to its sum of digits gives 16500553456530.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 403998910 + ... + 404039750.

It is an arithmetic number, because the mean of its divisors is an integer number (186255080802).

Almost surely, 2^{16500553456530} is an apocalyptic number.

16500553456530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16500553456530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23840650342656).

16500553456530 is an abundant number, since it is smaller than the sum of its proper divisors (31180747228782).

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

16500553456530 is a wasteful number, since it uses less digits than its factorization.

16500553456530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43213.

The product of its (nonzero) digits is 4050000, while the sum is 48.

The spelling of 16500553456530 in words is "sixteen trillion, five hundred billion, five hundred fifty-three million, four hundred fifty-six thousand, five hundred thirty".