655405563793 has 2 divisors, whose sum is σ = 655405563794. Its totient is φ = 655405563792.

The previous prime is 655405563689. The next prime is 655405563797. The reversal of 655405563793 is 397365504556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 411481195024 + 243924368769 = 641468^2 + 493887^2 .

It is a cyclic number.

It is not a de Polignac number, because 655405563793 - 2³⁷ = 517966610321 is a prime.

It is not a weakly prime, because it can be changed into another prime (655405563797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327702781896 + 327702781897.

It is an arithmetic number, because the mean of its divisors is an integer number (327702781897).

Almost surely, 2^655405563793 is an apocalyptic number.

It is an amenable number.

655405563793 is a deficient number, since it is larger than the sum of its proper divisors (1).

655405563793 is an equidigital number, since it uses as much as digits as its factorization.

655405563793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030000, while the sum is 58.

The spelling of 655405563793 in words is "six hundred fifty-five billion, four hundred five million, five hundred sixty-three thousand, seven hundred ninety-three".