205906656 has 48 divisors (see below), whose sum is σ = 541900800. Its totient is φ = 68458368.

The previous prime is 205906639. The next prime is 205906691. The reversal of 205906656 is 656609502.

It is a tau number, because it is divible by the number of its divisors (48).

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, 37665 + ... + 42783.

It is an arithmetic number, because the mean of its divisors is an integer number (11289600).

Almost surely, 2^205906656 is an apocalyptic number.

It is an amenable number.

205906656 is an abundant number, since it is smaller than the sum of its proper divisors (335994144).

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

205906656 is a wasteful number, since it uses less digits than its factorization.

205906656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551 (or 5543 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 205906656 is about 14349.4479336315. The cubic root of 205906656 is about 590.5048403356.

The spelling of 205906656 in words is "two hundred five million, nine hundred six thousand, six hundred fifty-six".