205550345664312 has 128 divisors (see below), whose sum is σ = 581705178808320. Its totient is φ = 59963098032000.

The previous prime is 205550345664211. The next prime is 205550345664317. The reversal of 205550345664312 is 213466543055502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205550345664317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64185868 + ... + 67312155.

It is an arithmetic number, because the mean of its divisors is an integer number (4544571709440).

Almost surely, 2^{205550345664312} is an apocalyptic number.

205550345664312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

205550345664312 is an abundant number, since it is smaller than the sum of its proper divisors (376154833144008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205550345664312 is a wasteful number, since it uses less digits than its factorization.

205550345664312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131498265 (or 131498261 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 51.

The spelling of 205550345664312 in words is "two hundred five trillion, five hundred fifty billion, three hundred forty-five million, six hundred sixty-four thousand, three hundred twelve".