17640136453 has 2 divisors, whose sum is σ = 17640136454. Its totient is φ = 17640136452.

The previous prime is 17640136399. The next prime is 17640136457. The reversal of 17640136453 is 35463104671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13447185444 + 4192951009 = 115962^2 + 64753^2 .

It is a cyclic number.

It is not a de Polignac number, because 17640136453 - 2⁹ = 17640135941 is a prime.

It is a super-2 number, since 2×17640136453² (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 (17640136457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8820068226 + 8820068227.

It is an arithmetic number, because the mean of its divisors is an integer number (8820068227).

Almost surely, 2^17640136453 is an apocalyptic number.

It is an amenable number.

17640136453 is a deficient number, since it is larger than the sum of its proper divisors (1).

17640136453 is an equidigital number, since it uses as much as digits as its factorization.

17640136453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 17640136453 in words is "seventeen billion, six hundred forty million, one hundred thirty-six thousand, four hundred fifty-three".