205511501136 has 40 divisors (see below), whose sum is σ = 530921053600. Its totient is φ = 68501725056.

The previous prime is 205511501131. The next prime is 205511501137. The reversal of 205511501136 is 631105115502.

205511501136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205511501131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2751906 + ... + 2825598.

It is an arithmetic number, because the mean of its divisors is an integer number (13273026340).

Almost surely, 2^205511501136 is an apocalyptic number.

It is an amenable number.

205511501136 is an abundant number, since it is smaller than the sum of its proper divisors (325409552464).

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

205511501136 is a wasteful number, since it uses less digits than its factorization.

205511501136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131803 (or 131797 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 205511501136 its reverse (631105115502), we get a palindrome (836616616638).

The spelling of 205511501136 in words is "two hundred five billion, five hundred eleven million, five hundred one thousand, one hundred thirty-six".