16505005512 has 32 divisors (see below), whose sum is σ = 41687906400. Its totient is φ = 5444949504.

The previous prime is 16505005499. The next prime is 16505005529. The reversal of 16505005512 is 21550050561.

It is a self number, because there is not a number n which added to its sum of digits gives 16505005512.

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 7 ways as a sum of consecutive naturals, for example, 3542562 + ... + 3547217.

It is an arithmetic number, because the mean of its divisors is an integer number (1302747075).

Almost surely, 2^16505005512 is an apocalyptic number.

16505005512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16505005512 is an abundant number, since it is smaller than the sum of its proper divisors (25182900888).

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

16505005512 is a wasteful number, since it uses less digits than its factorization.

16505005512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7089885 (or 7089881 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 16505005512 in words is "sixteen billion, five hundred five million, five thousand, five hundred twelve".