205501252724479 has 2 divisors, whose sum is σ = 205501252724480. Its totient is φ = 205501252724478.

The previous prime is 205501252724477. The next prime is 205501252724497. The reversal of 205501252724479 is 974427252105502.

Together with next prime (205501252724497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205501252724479 - 2¹ = 205501252724477 is a prime.

Together with 205501252724477, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205501252724477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102750626362239 + 102750626362240.

It is an arithmetic number, because the mean of its divisors is an integer number (102750626362240).

Almost surely, 2^{205501252724479} is an apocalyptic number.

205501252724479 is a deficient number, since it is larger than the sum of its proper divisors (1).

205501252724479 is an equidigital number, since it uses as much as digits as its factorization.

205501252724479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112000, while the sum is 55.

The spelling of 205501252724479 in words is "two hundred five trillion, five hundred one billion, two hundred fifty-two million, seven hundred twenty-four thousand, four hundred seventy-nine".