205102243445 has 16 divisors (see below), whose sum is σ = 274741612992. Its totient is φ = 145696306560.

The previous prime is 205102243403. The next prime is 205102243469. The reversal of 205102243445 is 544342201502.

It is not a de Polignac number, because 205102243445 - 2³² = 200807276149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43359632 + ... + 43364361.

It is an arithmetic number, because the mean of its divisors is an integer number (17171350812).

Almost surely, 2^205102243445 is an apocalyptic number.

It is an amenable number.

205102243445 is a deficient number, since it is larger than the sum of its proper divisors (69639369547).

205102243445 is a wasteful number, since it uses less digits than its factorization.

205102243445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86724052.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 205102243445 its reverse (544342201502), we get a palindrome (749444444947).

The spelling of 205102243445 in words is "two hundred five billion, one hundred two million, two hundred forty-three thousand, four hundred forty-five".