204243641635 has 32 divisors (see below), whose sum is σ = 273961336320. Its totient is φ = 144882681600.

The previous prime is 204243641627. The next prime is 204243641683. The reversal of 204243641635 is 536146342402.

It is not a de Polignac number, because 204243641635 - 2³ = 204243641627 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12355906 + ... + 12372424.

It is an arithmetic number, because the mean of its divisors is an integer number (8561291760).

Almost surely, 2^204243641635 is an apocalyptic number.

204243641635 is a deficient number, since it is larger than the sum of its proper divisors (69717694685).

204243641635 is a wasteful number, since it uses less digits than its factorization.

204243641635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22059.

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 204243641635 in words is "two hundred four billion, two hundred forty-three million, six hundred forty-one thousand, six hundred thirty-five".