16505056011 has 8 divisors (see below), whose sum is σ = 22007335824. Its totient is φ = 11003073440.

The previous prime is 16505055989. The next prime is 16505056081. The reversal of 16505056011 is 11065050561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16505056011 - 2⁵ = 16505055979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16505056011.

It is not an unprimeable number, because it can be changed into a prime (16505056081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170065 + ... + 248861.

It is an arithmetic number, because the mean of its divisors is an integer number (2750916978).

Almost surely, 2^16505056011 is an apocalyptic number.

16505056011 is a deficient number, since it is larger than the sum of its proper divisors (5502279813).

16505056011 is an equidigital number, since it uses as much as digits as its factorization.

16505056011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148621.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 16505056011 in words is "sixteen billion, five hundred five million, fifty-six thousand, eleven".