204102506495 has 4 divisors (see below), whose sum is σ = 244923007800. Its totient is φ = 163282005192.

The previous prime is 204102506471. The next prime is 204102506497. The reversal of 204102506495 is 594605201402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 204102506495 - 2¹⁶ = 204102440959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204102506497) 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, 20410250645 + ... + 20410250654.

It is an arithmetic number, because the mean of its divisors is an integer number (61230751950).

Almost surely, 2^204102506495 is an apocalyptic number.

204102506495 is a deficient number, since it is larger than the sum of its proper divisors (40820501305).

204102506495 is an equidigital number, since it uses as much as digits as its factorization.

204102506495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40820501304.

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 204102506495 its reverse (594605201402), we get a palindrome (798707707897).

The spelling of 204102506495 in words is "two hundred four billion, one hundred two million, five hundred six thousand, four hundred ninety-five".