655248557 has 2 divisors, whose sum is σ = 655248558. Its totient is φ = 655248556.

The previous prime is 655248551. The next prime is 655248569. The reversal of 655248557 is 755842556.

655248557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 581099236 + 74149321 = 24106^2 + 8611^2 .

It is a cyclic number.

It is not a de Polignac number, because 655248557 - 2¹⁸ = 654986413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655248551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327624278 + 327624279.

It is an arithmetic number, because the mean of its divisors is an integer number (327624279).

Almost surely, 2^655248557 is an apocalyptic number.

It is an amenable number.

655248557 is a deficient number, since it is larger than the sum of its proper divisors (1).

655248557 is an equidigital number, since it uses as much as digits as its factorization.

655248557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680000, while the sum is 47.

The square root of 655248557 is about 25597.8232863656. The cubic root of 655248557 is about 868.5643990306.

The spelling of 655248557 in words is "six hundred fifty-five million, two hundred forty-eight thousand, five hundred fifty-seven".