205286785038 has 24 divisors (see below), whose sum is σ = 444886549848. Its totient is φ = 68413772112.

The previous prime is 205286785013. The next prime is 205286785043. The reversal of 205286785038 is 830587682502.

205286785038 is a `hidden beast` number, since 2 + 0 + 52 + 86 + 7 + 8 + 503 + 8 = 666.

It is a super-2 number, since 2×205286785038² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1179345 + ... + 1342172.

It is an arithmetic number, because the mean of its divisors is an integer number (18536939577).

Almost surely, 2^205286785038 is an apocalyptic number.

205286785038 is an abundant number, since it is smaller than the sum of its proper divisors (239599764810).

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

205286785038 is a wasteful number, since it uses less digits than its factorization.

205286785038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526048 (or 2526045 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 54.

The spelling of 205286785038 in words is "two hundred five billion, two hundred eighty-six million, seven hundred eighty-five thousand, thirty-eight".