205447212672 has 128 divisors (see below), whose sum is σ = 594302184000. Its totient is φ = 62504116224.

The previous prime is 205447212587. The next prime is 205447212679. The reversal of 205447212672 is 276212744502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (205447212679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213079 + ... + 675497.

Almost surely, 2^205447212672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205447212672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297151092000).

205447212672 is an abundant number, since it is smaller than the sum of its proper divisors (388854971328).

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

205447212672 is a wasteful number, since it uses less digits than its factorization.

205447212672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462538 (or 462526 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 42.

The spelling of 205447212672 in words is "two hundred five billion, four hundred forty-seven million, two hundred twelve thousand, six hundred seventy-two".