16505133540 has 72 divisors (see below), whose sum is σ = 53759587392. Its totient is φ = 3772601280.

The previous prime is 16505133529. The next prime is 16505133581. The reversal of 16505133540 is 4533150561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2804056 + ... + 2809935.

It is an arithmetic number, because the mean of its divisors is an integer number (746660936).

Almost surely, 2^16505133540 is an apocalyptic number.

16505133540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16505133540 is an abundant number, since it is smaller than the sum of its proper divisors (37254453852).

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

16505133540 is a wasteful number, since it uses less digits than its factorization.

16505133540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5614017 (or 5614008 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 16505133540 in words is "sixteen billion, five hundred five million, one hundred thirty-three thousand, five hundred forty".