204680554415 has 4 divisors (see below), whose sum is σ = 245616665304. Its totient is φ = 163744443528.

The previous prime is 204680554391. The next prime is 204680554417. The reversal of 204680554415 is 514455086402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204680554415 is a prime.

It is a super-3 number, since 3×204680554415³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204680554417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20468055437 + ... + 20468055446.

It is an arithmetic number, because the mean of its divisors is an integer number (61404166326).

Almost surely, 2^204680554415 is an apocalyptic number.

204680554415 is a deficient number, since it is larger than the sum of its proper divisors (40936110889).

204680554415 is an equidigital number, since it uses as much as digits as its factorization.

204680554415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40936110888.

The product of its (nonzero) digits is 768000, while the sum is 44.

The spelling of 204680554415 in words is "two hundred four billion, six hundred eighty million, five hundred fifty-four thousand, four hundred fifteen".