205385658403 has 8 divisors (see below), whose sum is σ = 207711257040. Its totient is φ = 203060457600.

The previous prime is 205385658397. The next prime is 205385658433. The reversal of 205385658403 is 304856583502.

205385658403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205385658403 - 2⁵ = 205385658371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205385658433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008328 + ... + 1194778.

It is an arithmetic number, because the mean of its divisors is an integer number (25963907130).

Almost surely, 2^205385658403 is an apocalyptic number.

205385658403 is a deficient number, since it is larger than the sum of its proper divisors (2325598637).

205385658403 is a wasteful number, since it uses less digits than its factorization.

205385658403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198917.

The product of its (nonzero) digits is 3456000, while the sum is 49.

The spelling of 205385658403 in words is "two hundred five billion, three hundred eighty-five million, six hundred fifty-eight thousand, four hundred three".