16535505000 has 640 divisors, whose sum is σ = 63483678720. Its totient is φ = 3505920000.

The previous prime is 16535504989. The next prime is 16535505001. The reversal of 16535505000 is 50553561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16535505001) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 99014917 + ... + 99015083.

It is an arithmetic number, because the mean of its divisors is an integer number (99193248).

Almost surely, 2^16535505000 is an apocalyptic number.

16535505000 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 16535505000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31741839360).

16535505000 is an abundant number, since it is smaller than the sum of its proper divisors (46948173720).

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

16535505000 is a wasteful number, since it uses less digits than its factorization.

16535505000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

The spelling of 16535505000 in words is "sixteen billion, five hundred thirty-five million, five hundred five thousand".