16505111056 has 40 divisors (see below), whose sum is σ = 37396973504. Its totient is φ = 6909114240.

The previous prime is 16505111053. The next prime is 16505111057. The reversal of 16505111056 is 65011150561.

It is not an unprimeable number, because it can be changed into a prime (16505111053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1708755 + ... + 1718386.

Almost surely, 2^16505111056 is an apocalyptic number.

16505111056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16505111056 is an abundant number, since it is smaller than the sum of its proper divisors (20891862448).

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

16505111056 is a wasteful number, since it uses less digits than its factorization.

16505111056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427199 (or 3427193 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 16505111056 in words is "sixteen billion, five hundred five million, one hundred eleven thousand, fifty-six".