16641125513 has 4 divisors (see below), whose sum is σ = 17090885700. Its totient is φ = 16191365328.

The previous prime is 16641125507. The next prime is 16641125533. The reversal of 16641125513 is 31552114661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31552114661 = 337 ⋅93626453.

It can be written as a sum of positive squares in 2 ways, for example, as 15472374544 + 1168750969 = 124388^2 + 34187^2 .

It is a cyclic number.

It is not a de Polignac number, because 16641125513 - 2²² = 16636931209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16641125503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224880038 + ... + 224880111.

It is an arithmetic number, because the mean of its divisors is an integer number (4272721425).

Almost surely, 2^16641125513 is an apocalyptic number.

It is an amenable number.

16641125513 is a deficient number, since it is larger than the sum of its proper divisors (449760187).

16641125513 is an equidigital number, since it uses as much as digits as its factorization.

16641125513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449760186.

The product of its digits is 21600, while the sum is 35.

The spelling of 16641125513 in words is "sixteen billion, six hundred forty-one million, one hundred twenty-five thousand, five hundred thirteen".