16501650012 has 72 divisors (see below), whose sum is σ = 43555817760. Its totient is φ = 5257802880.

The previous prime is 16501650001. The next prime is 16501650019. The reversal of 16501650012 is 21005610561.

It is a happy number.

16501650012 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 1 + 650 + 0 + 1 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16501650019) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1375962 + ... + 1387902.

Almost surely, 2^16501650012 is an apocalyptic number.

16501650012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16501650012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21777908880).

16501650012 is an abundant number, since it is smaller than the sum of its proper divisors (27054167748).

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

16501650012 is a wasteful number, since it uses less digits than its factorization.

16501650012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13643 (or 13638 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 16501650012 in words is "sixteen billion, five hundred one million, six hundred fifty thousand, twelve".