205221761878384 has 40 divisors (see below), whose sum is σ = 398748724265232. Its totient is φ = 102318872832000.

The previous prime is 205221761878351. The next prime is 205221761878429. The reversal of 205221761878384 is 483878167122502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549267634 + ... + 549641134.

Almost surely, 2^{205221761878384} is an apocalyptic number.

It is an amenable number.

205221761878384 is a deficient number, since it is larger than the sum of its proper divisors (193526962386848).

205221761878384 is a wasteful number, since it uses less digits than its factorization.

205221761878384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471145 (or 471139 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 64.

The spelling of 205221761878384 in words is "two hundred five trillion, two hundred twenty-one billion, seven hundred sixty-one million, eight hundred seventy-eight thousand, three hundred eighty-four".