205787706256 has 40 divisors (see below), whose sum is σ = 435047940864. Its totient is φ = 93521036160.

The previous prime is 205787706253. The next prime is 205787706269. The reversal of 205787706256 is 652607787502.

205787706256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×205787706256² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205787706197 and 205787706206.

It is not an unprimeable number, because it can be changed into a prime (205787706253) 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, 778401 + ... + 1008703.

Almost surely, 2^205787706256 is an apocalyptic number.

It is an amenable number.

205787706256 is an abundant number, since it is smaller than the sum of its proper divisors (229260234608).

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

205787706256 is a wasteful number, since it uses less digits than its factorization.

205787706256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235399 (or 235393 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 55.

The spelling of 205787706256 in words is "two hundred five billion, seven hundred eighty-seven million, seven hundred six thousand, two hundred fifty-six".