16011116525 has 6 divisors (see below), whose sum is σ = 19853784522. Its totient is φ = 12808893200.

The previous prime is 16011116509. The next prime is 16011116573. The reversal of 16011116525 is 52561111061.

It can be written as a sum of positive squares in 3 ways, for example, as 950427241 + 15060689284 = 30829^2 + 122722^2 .

It is not a de Polignac number, because 16011116525 - 2⁴ = 16011116509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 320222306 + ... + 320222355.

It is an arithmetic number, because the mean of its divisors is an integer number (3308964087).

Almost surely, 2^16011116525 is an apocalyptic number.

It is an amenable number.

16011116525 is a deficient number, since it is larger than the sum of its proper divisors (3842667997).

16011116525 is an equidigital number, since it uses as much as digits as its factorization.

16011116525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640444671 (or 640444666 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 29.

Adding to 16011116525 its reverse (52561111061), we get a palindrome (68572227586).

The spelling of 16011116525 in words is "sixteen billion, eleven million, one hundred sixteen thousand, five hundred twenty-five".