16501506648 has 96 divisors (see below), whose sum is σ = 46022383680. Its totient is φ = 4925764800.

The previous prime is 16501506641. The next prime is 16501506673. The reversal of 16501506648 is 84660510561.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16501506641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152163 + ... + 236973.

It is an arithmetic number, because the mean of its divisors is an integer number (479399830).

Almost surely, 2^16501506648 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 16501506648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23011191840).

16501506648 is an abundant number, since it is smaller than the sum of its proper divisors (29520877032).

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

16501506648 is a wasteful number, since it uses less digits than its factorization.

16501506648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84909 (or 84894 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 16501506648 in words is "sixteen billion, five hundred one million, five hundred six thousand, six hundred forty-eight".