205245316603 has 32 divisors (see below), whose sum is σ = 216126719424. Its totient is φ = 194726633472.

The previous prime is 205245316583. The next prime is 205245316607. The reversal of 205245316603 is 306613542502.

It is a cyclic number.

It is not a de Polignac number, because 205245316603 - 2⁹ = 205245316091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205245316607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75651175 + ... + 75653887.

It is an arithmetic number, because the mean of its divisors is an integer number (6753959982).

Almost surely, 2^205245316603 is an apocalyptic number.

205245316603 is a deficient number, since it is larger than the sum of its proper divisors (10881402821).

205245316603 is a wasteful number, since it uses less digits than its factorization.

205245316603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3151.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 205245316603 in words is "two hundred five billion, two hundred forty-five million, three hundred sixteen thousand, six hundred three".