205456165250456 has 16 divisors (see below), whose sum is σ = 398514113632800. Its totient is φ = 99185734948384.

The previous prime is 205456165250431. The next prime is 205456165250477. The reversal of 205456165250456 is 654052561654502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442793459360 + ... + 442793459823.

It is an arithmetic number, because the mean of its divisors is an integer number (24907132102050).

Almost surely, 2^{205456165250456} is an apocalyptic number.

It is an amenable number.

205456165250456 is a deficient number, since it is larger than the sum of its proper divisors (193057948382344).

205456165250456 is a wasteful number, since it uses less digits than its factorization.

205456165250456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885586919218 (or 885586919214 counting only the distinct ones).

The product of its (nonzero) digits is 43200000, while the sum is 56.

The spelling of 205456165250456 in words is "two hundred five trillion, four hundred fifty-six billion, one hundred sixty-five million, two hundred fifty thousand, four hundred fifty-six".