205660016 has 40 divisors (see below), whose sum is σ = 425062080. Its totient is φ = 96057344.

The previous prime is 205659991. The next prime is 205660019. The reversal of 205660016 is 610066502.

It is a super-2 number, since 2×205660016² = 84592084362240512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205660019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34505 + ... + 40023.

It is an arithmetic number, because the mean of its divisors is an integer number (10626552).

Almost surely, 2^205660016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205660016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212531040).

205660016 is an abundant number, since it is smaller than the sum of its proper divisors (219402064).

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

205660016 is a wasteful number, since it uses less digits than its factorization.

205660016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681 (or 5675 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 205660016 is about 14340.8512996963. The cubic root of 205660016 is about 590.2689724483.

The spelling of 205660016 in words is "two hundred five million, six hundred sixty thousand, sixteen".