205124155146 has 12 divisors (see below), whose sum is σ = 444435669522. Its totient is φ = 68374718376.

The previous prime is 205124155139. The next prime is 205124155157. The reversal of 205124155146 is 641551421502.

205124155146 is a `hidden beast` number, since 2 + 0 + 5 + 124 + 15 + 514 + 6 = 666.

205124155146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 162417866121 + 42706289025 = 403011^2 + 206655^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205124155146.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 5697893181 + ... + 5697893216.

Almost surely, 2^205124155146 is an apocalyptic number.

205124155146 is an abundant number, since it is smaller than the sum of its proper divisors (239311514376).

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

205124155146 is a wasteful number, since it uses less digits than its factorization.

205124155146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11395786405 (or 11395786402 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

Adding to 205124155146 its reverse (641551421502), we get a palindrome (846675576648).

The spelling of 205124155146 in words is "two hundred five billion, one hundred twenty-four million, one hundred fifty-five thousand, one hundred forty-six".