205354086872 has 32 divisors (see below), whose sum is σ = 431394955920. Its totient is φ = 90819987840.

The previous prime is 205354086871. The next prime is 205354086911. The reversal of 205354086872 is 278680453502.

205354086872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 205354086872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205354086871) 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, 31531463 + ... + 31537974.

Almost surely, 2^205354086872 is an apocalyptic number.

205354086872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

205354086872 is an abundant number, since it is smaller than the sum of its proper divisors (226040869048).

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

205354086872 is a wasteful number, since it uses less digits than its factorization.

205354086872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63069491 (or 63069487 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 50.

It can be divided in two parts, 2053540 and 86872, that added together give a palindrome (2140412).

The spelling of 205354086872 in words is "two hundred five billion, three hundred fifty-four million, eighty-six thousand, eight hundred seventy-two".