205475566650 has 48 divisors (see below), whose sum is σ = 521430105504. Its totient is φ = 53519215680.

The previous prime is 205475566627. The next prime is 205475566669. The reversal of 205475566650 is 56665574502.

It is a junction number, because it is equal to n+sod(n) for n = 205475566593 and 205475566602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15921889 + ... + 15934788.

It is an arithmetic number, because the mean of its divisors is an integer number (10863127198).

Almost surely, 2^205475566650 is an apocalyptic number.

205475566650 is an abundant number, since it is smaller than the sum of its proper divisors (315954538854).

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

205475566650 is a wasteful number, since it uses less digits than its factorization.

205475566650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31856735 (or 31856730 counting only the distinct ones).

The product of its (nonzero) digits is 7560000, while the sum is 51.

The spelling of 205475566650 in words is "two hundred five billion, four hundred seventy-five million, five hundred sixty-six thousand, six hundred fifty".