204621215632 has 60 divisors (see below), whose sum is σ = 425236005376. Its totient is φ = 95357237760.

The previous prime is 204621215627. The next prime is 204621215651. The reversal of 204621215632 is 236512126402.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261457 + ... + 691087.

Almost surely, 2^204621215632 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 204621215632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212618002688).

204621215632 is an abundant number, since it is smaller than the sum of its proper divisors (220614789744).

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

204621215632 is a wasteful number, since it uses less digits than its factorization.

204621215632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429776 (or 429753 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 204621215632 in words is "two hundred four billion, six hundred twenty-one million, two hundred fifteen thousand, six hundred thirty-two".