655017553 has 2 divisors, whose sum is σ = 655017554. Its totient is φ = 655017552.

The previous prime is 655017551. The next prime is 655017607. The reversal of 655017553 is 355710556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372374209 + 282643344 = 19297^2 + 16812^2 .

It is a cyclic number.

It is not a de Polignac number, because 655017553 - 2¹ = 655017551 is a prime.

Together with 655017551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (655017551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327508776 + 327508777.

It is an arithmetic number, because the mean of its divisors is an integer number (327508777).

Almost surely, 2^655017553 is an apocalyptic number.

It is an amenable number.

655017553 is a deficient number, since it is larger than the sum of its proper divisors (1).

655017553 is an equidigital number, since it uses as much as digits as its factorization.

655017553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78750, while the sum is 37.

The square root of 655017553 is about 25593.3107080737. The cubic root of 655017553 is about 868.4623179545.

The spelling of 655017553 in words is "six hundred fifty-five million, seventeen thousand, five hundred fifty-three".