205720272416 has 24 divisors (see below), whose sum is σ = 405029386944. Its totient is φ = 102855666240.

The previous prime is 205720272403. The next prime is 205720272437. The reversal of 205720272416 is 614272027502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 205720272416.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682661 + ... + 936731.

It is an arithmetic number, because the mean of its divisors is an integer number (16876224456).

Almost surely, 2^205720272416 is an apocalyptic number.

It is an amenable number.

205720272416 is a deficient number, since it is larger than the sum of its proper divisors (199309114528).

205720272416 is a wasteful number, since it uses less digits than its factorization.

205720272416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279384 (or 279376 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 38.

Adding to 205720272416 its reverse (614272027502), we get a palindrome (819992299918).

The spelling of 205720272416 in words is "two hundred five billion, seven hundred twenty million, two hundred seventy-two thousand, four hundred sixteen".