205551683872 has 12 divisors (see below), whose sum is σ = 404679877686. Its totient is φ = 102775841920.

The previous prime is 205551683861. The next prime is 205551683899. The reversal of 205551683872 is 278386155502.

205551683872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 107555137936 + 97996545936 = 327956^2 + 313044^2 .

It is a super-2 number, since 2×205551683872² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211745029 + ... + 3211745092.

Almost surely, 2^205551683872 is an apocalyptic number.

It is an amenable number.

205551683872 is a deficient number, since it is larger than the sum of its proper divisors (199128193814).

205551683872 is an equidigital number, since it uses as much as digits as its factorization.

205551683872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423490131 (or 6423490123 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 205551683872 in words is "two hundred five billion, five hundred fifty-one million, six hundred eighty-three thousand, eight hundred seventy-two".