653129423549 has 2 divisors, whose sum is σ = 653129423550. Its totient is φ = 653129423548.

The previous prime is 653129423543. The next prime is 653129423633. The reversal of 653129423549 is 945324921356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585278551225 + 67850872324 = 765035^2 + 260482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653129423549 is a prime.

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 653129423549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653129423543) 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, 326564711774 + 326564711775.

It is an arithmetic number, because the mean of its divisors is an integer number (326564711775).

Almost surely, 2^653129423549 is an apocalyptic number.

It is an amenable number.

653129423549 is a deficient number, since it is larger than the sum of its proper divisors (1).

653129423549 is an equidigital number, since it uses as much as digits as its factorization.

653129423549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6998400, while the sum is 53.

The spelling of 653129423549 in words is "six hundred fifty-three billion, one hundred twenty-nine million, four hundred twenty-three thousand, five hundred forty-nine".