655516613 has 2 divisors, whose sum is σ = 655516614. Its totient is φ = 655516612.

The previous prime is 655516601. The next prime is 655516619. The reversal of 655516613 is 316615556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 652138369 + 3378244 = 25537^2 + 1838^2 .

It is a cyclic number.

It is not a de Polignac number, because 655516613 - 2⁸ = 655516357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655516619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327758306 + 327758307.

It is an arithmetic number, because the mean of its divisors is an integer number (327758307).

Almost surely, 2^655516613 is an apocalyptic number.

It is an amenable number.

655516613 is a deficient number, since it is larger than the sum of its proper divisors (1).

655516613 is an equidigital number, since it uses as much as digits as its factorization.

655516613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 38.

The square root of 655516613 is about 25603.0586649330. The cubic root of 655516613 is about 868.6828233825.

The spelling of 655516613 in words is "six hundred fifty-five million, five hundred sixteen thousand, six hundred thirteen".