204502134545 has 4 divisors (see below), whose sum is σ = 245402561460. Its totient is φ = 163601707632.

The previous prime is 204502134527. The next prime is 204502134553. The reversal of 204502134545 is 545431205402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48385481089 + 156116653456 = 219967^2 + 395116^2 .

It is a cyclic number.

It is not a de Polignac number, because 204502134545 - 2¹² = 204502130449 is a prime.

It is a super-2 number, since 2×204502134545² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20450213450 + ... + 20450213459.

It is an arithmetic number, because the mean of its divisors is an integer number (61350640365).

Almost surely, 2^204502134545 is an apocalyptic number.

It is an amenable number.

204502134545 is a deficient number, since it is larger than the sum of its proper divisors (40900426915).

204502134545 is an equidigital number, since it uses as much as digits as its factorization.

204502134545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40900426914.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 204502134545 its reverse (545431205402), we get a palindrome (749933339947).

The spelling of 204502134545 in words is "two hundred four billion, five hundred two million, one hundred thirty-four thousand, five hundred forty-five".