205654129063 has 2 divisors, whose sum is σ = 205654129064. Its totient is φ = 205654129062.

The previous prime is 205654129007. The next prime is 205654129073. The reversal of 205654129063 is 360921456502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205654129063 - 2⁹ = 205654128551 is a prime.

It is a super-2 number, since 2×205654129063² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205654129073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102827064531 + 102827064532.

It is an arithmetic number, because the mean of its divisors is an integer number (102827064532).

Almost surely, 2^205654129063 is an apocalyptic number.

205654129063 is a deficient number, since it is larger than the sum of its proper divisors (1).

205654129063 is an equidigital number, since it uses as much as digits as its factorization.

205654129063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 205654129063 in words is "two hundred five billion, six hundred fifty-four million, one hundred twenty-nine thousand, sixty-three".