205901767696 has 45 divisors (see below), whose sum is σ = 423845333751. Its totient is φ = 96880429056.

The previous prime is 205901767667. The next prime is 205901767751. The reversal of 205901767696 is 696767109502.

The square root of 205901767696 is 453764.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 17892807696 + 188008960000 = 133764^2 + 433600^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205901767696.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30852616 + ... + 30859288.

Almost surely, 2^205901767696 is an apocalyptic number.

205901767696 is the 453764-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205901767696

205901767696 is an abundant number, since it is smaller than the sum of its proper divisors (217943566055).

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

205901767696 is an frugal number, since it uses more digits than its factorization.

205901767696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13388 (or 6692 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 205901767696 in words is "two hundred five billion, nine hundred one million, seven hundred sixty-seven thousand, six hundred ninety-six".