17640502853 has 2 divisors, whose sum is σ = 17640502854. Its totient is φ = 17640502852.

The previous prime is 17640502813. The next prime is 17640502933. The reversal of 17640502853 is 35820504671.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17631059524 + 9443329 = 132782^2 + 3073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17640502853 is a prime.

It is a super-2 number, since 2×17640502853² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 17640502853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17640502813) by changing a digit.

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 as a sum of consecutive naturals, namely, 8820251426 + 8820251427.

It is an arithmetic number, because the mean of its divisors is an integer number (8820251427).

Almost surely, 2^17640502853 is an apocalyptic number.

It is an amenable number.

17640502853 is a deficient number, since it is larger than the sum of its proper divisors (1).

17640502853 is an equidigital number, since it uses as much as digits as its factorization.

17640502853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 17640502853 in words is "seventeen billion, six hundred forty million, five hundred two thousand, eight hundred fifty-three".