16065816001 has 3 divisors (see below), whose sum is σ = 16065942753. Its totient is φ = 16065689250.

The previous prime is 16065815981. The next prime is 16065816023. The reversal of 16065816001 is 10061856061.

The square root of 16065816001 is 126751.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 16065816001 - 2¹⁹ = 16065291713 is a prime.

It is a super-2 number, since 2×16065816001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16065816101) 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 2 ways as a sum of consecutive naturals, for example, 63376 + ... + 190126.

It is an arithmetic number, because the mean of its divisors is an integer number (5355314251).

Almost surely, 2^16065816001 is an apocalyptic number.

16065816001 is the 126751-st square number.

16065816001 is the 63376-th centered octagonal number.

It is an amenable number.

16065816001 is a deficient number, since it is larger than the sum of its proper divisors (126752).

16065816001 is an frugal number, since it uses more digits than its factorization.

16065816001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253502 (or 126751 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 16065816001 in words is "sixteen billion, sixty-five million, eight hundred sixteen thousand, one".