205412445413 has 4 divisors (see below), whose sum is σ = 234757080480. Its totient is φ = 176067810348.

The previous prime is 205412445397. The next prime is 205412445439. The reversal of 205412445413 is 314544214502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205412445413 - 2⁴ = 205412445397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205412445463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14672317523 + ... + 14672317536.

It is an arithmetic number, because the mean of its divisors is an integer number (58689270120).

Almost surely, 2^205412445413 is an apocalyptic number.

It is an amenable number.

205412445413 is a deficient number, since it is larger than the sum of its proper divisors (29344635067).

205412445413 is an equidigital number, since it uses as much as digits as its factorization.

205412445413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29344635066.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 205412445413 its reverse (314544214502), we get a palindrome (519956659915).

The spelling of 205412445413 in words is "two hundred five billion, four hundred twelve million, four hundred forty-five thousand, four hundred thirteen".