204541354639 has 16 divisors (see below), whose sum is σ = 209110730400. Its totient is φ = 200011591296.

The previous prime is 204541354489. The next prime is 204541354709. The reversal of 204541354639 is 936453145402.

It is a cyclic number.

It is not a de Polignac number, because 204541354639 - 2¹⁷ = 204541223567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204541324639) 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, 8548777 + ... + 8572669.

It is an arithmetic number, because the mean of its divisors is an integer number (13069420650).

Almost surely, 2^204541354639 is an apocalyptic number.

204541354639 is a deficient number, since it is larger than the sum of its proper divisors (4569375761).

204541354639 is a wasteful number, since it uses less digits than its factorization.

204541354639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24714.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 204541354639 in words is "two hundred four billion, five hundred forty-one million, three hundred fifty-four thousand, six hundred thirty-nine".