16505335500 has 96 divisors (see below), whose sum is σ = 49721031360. Its totient is φ = 4249638400.

The previous prime is 16505335499. The next prime is 16505335507. The reversal of 16505335500 is 553350561.

It is not an unprimeable number, because it can be changed into a prime (16505335507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146217 + ... + 233216.

It is an arithmetic number, because the mean of its divisors is an integer number (517927410).

Almost surely, 2^16505335500 is an apocalyptic number.

16505335500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16505335500 is an abundant number, since it is smaller than the sum of its proper divisors (33215695860).

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

16505335500 is a wasteful number, since it uses less digits than its factorization.

16505335500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379484 (or 379472 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 33.

The spelling of 16505335500 in words is "sixteen billion, five hundred five million, three hundred thirty-five thousand, five hundred".