205104442451 has 8 divisors (see below), whose sum is σ = 217233213120. Its totient is φ = 192982761088.

The previous prime is 205104442427. The next prime is 205104442453. The reversal of 205104442451 is 154244401502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205104442451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205104442453) 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, 1712696 + ... + 1828533.

It is an arithmetic number, because the mean of its divisors is an integer number (27154151640).

Almost surely, 2^205104442451 is an apocalyptic number.

205104442451 is a deficient number, since it is larger than the sum of its proper divisors (12128770669).

205104442451 is a wasteful number, since it uses less digits than its factorization.

205104442451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3544653.

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 205104442451 its reverse (154244401502), we get a palindrome (359348843953).

The spelling of 205104442451 in words is "two hundred five billion, one hundred four million, four hundred forty-two thousand, four hundred fifty-one".