205054640456 has 32 divisors (see below), whose sum is σ = 388893398400. Its totient is φ = 101353238400.

The previous prime is 205054640431. The next prime is 205054640491. The reversal of 205054640456 is 654046450502.

205054640456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250181 + ... + 687531.

It is an arithmetic number, because the mean of its divisors is an integer number (12152918700).

Almost surely, 2^205054640456 is an apocalyptic number.

It is an amenable number.

205054640456 is a deficient number, since it is larger than the sum of its proper divisors (183838757944).

205054640456 is a wasteful number, since it uses less digits than its factorization.

205054640456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438029 (or 438025 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 41.

The spelling of 205054640456 in words is "two hundred five billion, fifty-four million, six hundred forty thousand, four hundred fifty-six".