205298222642 has 6 divisors (see below), whose sum is σ = 307948295133. Its totient is φ = 102648790932.

The previous prime is 205298222639. The next prime is 205298222669. The reversal of 205298222642 is 246222892502.

It can be written as a sum of positive squares in 2 ways, for example, as 166757072881 + 38541149761 = 408359^2 + 196319^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=320389.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205298222593 and 205298222602.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 480584 + ... + 800972.

Almost surely, 2^205298222642 is an apocalyptic number.

205298222642 is a deficient number, since it is larger than the sum of its proper divisors (102650072491).

205298222642 is an frugal number, since it uses more digits than its factorization.

205298222642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640780 (or 320391 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 205298222642 in words is "two hundred five billion, two hundred ninety-eight million, two hundred twenty-two thousand, six hundred forty-two".