17640516653 has 2 divisors, whose sum is σ = 17640516654. Its totient is φ = 17640516652.

The previous prime is 17640516643. The next prime is 17640516689. The reversal of 17640516653 is 35661504671.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11782451209 + 5858065444 = 108547^2 + 76538^2 .

It is a cyclic number.

It is not a de Polignac number, because 17640516653 - 2⁶ = 17640516589 is a prime.

It is a super-2 number, since 2×17640516653² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17640516643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8820258326 + 8820258327.

It is an arithmetic number, because the mean of its divisors is an integer number (8820258327).

Almost surely, 2^17640516653 is an apocalyptic number.

It is an amenable number.

17640516653 is a deficient number, since it is larger than the sum of its proper divisors (1).

17640516653 is an equidigital number, since it uses as much as digits as its factorization.

17640516653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 17640516653 in words is "seventeen billion, six hundred forty million, five hundred sixteen thousand, six hundred fifty-three".