16200720008 has 36 divisors (see below), whose sum is σ = 33397044135. Its totient is φ = 7362163600.

The previous prime is 16200719999. The next prime is 16200720017. The reversal of 16200720008 is 80002700261.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

16200720008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16200719999) and next prime (16200720017).

It can be written as a sum of positive squares in only one way, i.e., 8100360004 + 8100360004 = 90002^2 + 90002^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=90002.

It is a super-2 number, since 2×16200720008² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3958043 + ... + 3962133.

Almost surely, 2^16200720008 is an apocalyptic number.

It is an amenable number.

16200720008 is an abundant number, since it is smaller than the sum of its proper divisors (17196324127).

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

16200720008 is an frugal number, since it uses more digits than its factorization.

16200720008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210 (or 4104 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The spelling of 16200720008 in words is "sixteen billion, two hundred million, seven hundred twenty thousand, eight".