205450450453651 has 12 divisors (see below), whose sum is σ = 222508753043808. Its totient is φ = 189613546540704.

The previous prime is 205450450453643. The next prime is 205450450453697. The reversal of 205450450453651 is 156354054054502.

205450450453651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205450450453651 - 2³ = 205450450453643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205450450453595 and 205450450453604.

It is not an unprimeable number, because it can be changed into a prime (205450450453621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104869860 + ... + 106810993.

It is an arithmetic number, because the mean of its divisors is an integer number (18542396086984).

Almost surely, 2^{205450450453651} is an apocalyptic number.

205450450453651 is a deficient number, since it is larger than the sum of its proper divisors (17058302590157).

205450450453651 is a wasteful number, since it uses less digits than its factorization.

205450450453651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211686622 (or 211686609 counting only the distinct ones).

The product of its (nonzero) digits is 7200000, while the sum is 49.

The spelling of 205450450453651 in words is "two hundred five trillion, four hundred fifty billion, four hundred fifty million, four hundred fifty-three thousand, six hundred fifty-one".