205053312345 has 32 divisors (see below), whose sum is σ = 376838860800. Its totient is φ = 93267599040.

The previous prime is 205053312311. The next prime is 205053312377. The reversal of 205053312345 is 543213350502.

It is not a de Polignac number, because 205053312345 - 2⁹ = 205053311833 is a prime.

It is a super-2 number, since 2×205053312345² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4885861 + ... + 4927650.

It is an arithmetic number, because the mean of its divisors is an integer number (11776214400).

Almost surely, 2^205053312345 is an apocalyptic number.

It is an amenable number.

205053312345 is a deficient number, since it is larger than the sum of its proper divisors (171785548455).

205053312345 is a wasteful number, since it uses less digits than its factorization.

205053312345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9813725.

The product of its (nonzero) digits is 54000, while the sum is 33.

Adding to 205053312345 its reverse (543213350502), we get a palindrome (748266662847).

The spelling of 205053312345 in words is "two hundred five billion, fifty-three million, three hundred twelve thousand, three hundred forty-five".