205490919073 has 8 divisors (see below), whose sum is σ = 224179892640. Its totient is φ = 186803275680.

The previous prime is 205490919071. The next prime is 205490919077. The reversal of 205490919073 is 370919094502.

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 205490919073 - 2¹ = 205490919071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205490919071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5413 + ... + 641101.

It is an arithmetic number, because the mean of its divisors is an integer number (28022486580).

Almost surely, 2^205490919073 is an apocalyptic number.

It is an amenable number.

205490919073 is a deficient number, since it is larger than the sum of its proper divisors (18688973567).

205490919073 is a wasteful number, since it uses less digits than its factorization.

205490919073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665087.

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 205490919073 in words is "two hundred five billion, four hundred ninety million, nine hundred nineteen thousand, seventy-three".