205299151434 has 24 divisors (see below), whose sum is σ = 479031353892. Its totient is φ = 63168969600.

The previous prime is 205299151429. The next prime is 205299151451. The reversal of 205299151434 is 434151992502.

It is a happy number.

205299151434 is a `hidden beast` number, since 2 + 0 + 529 + 91 + 5 + 1 + 4 + 34 = 666.

205299151434 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 197533135809 + 7766015625 = 444447^2 + 88125^2 .

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 205299151434.

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 11 ways as a sum of consecutive naturals, for example, 438673167 + ... + 438673634.

Almost surely, 2^205299151434 is an apocalyptic number.

205299151434 is an abundant number, since it is smaller than the sum of its proper divisors (273732202458).

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

205299151434 is a wasteful number, since it uses less digits than its factorization.

205299151434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877346822 (or 877346819 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 205299151434 in words is "two hundred five billion, two hundred ninety-nine million, one hundred fifty-one thousand, four hundred thirty-four".