16504143653 has 2 divisors, whose sum is σ = 16504143654. Its totient is φ = 16504143652.

The previous prime is 16504143637. The next prime is 16504143659. The reversal of 16504143653 is 35634140561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15783650689 + 720492964 = 125633^2 + 26842^2 .

It is an emirp because it is prime and its reverse (35634140561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16504143653 - 2⁴ = 16504143637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16504143659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252071826 + 8252071827.

It is an arithmetic number, because the mean of its divisors is an integer number (8252071827).

Almost surely, 2^16504143653 is an apocalyptic number.

It is an amenable number.

16504143653 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504143653 is an equidigital number, since it uses as much as digits as its factorization.

16504143653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 16504143653 in words is "sixteen billion, five hundred four million, one hundred forty-three thousand, six hundred fifty-three".