16505645104 has 80 divisors (see below), whose sum is σ = 36159873120. Its totient is φ = 7245342720.

The previous prime is 16505645099. The next prime is 16505645113. The reversal of 16505645104 is 40154650561.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383724 + ... + 424564.

It is an arithmetic number, because the mean of its divisors is an integer number (451998414).

Almost surely, 2^16505645104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16505645104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18079936560).

16505645104 is an abundant number, since it is smaller than the sum of its proper divisors (19654228016).

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

16505645104 is a wasteful number, since it uses less digits than its factorization.

16505645104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40958 (or 40952 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 16505645104 in words is "sixteen billion, five hundred five million, six hundred forty-five thousand, one hundred four".