204455121324516 has 48 divisors (see below), whose sum is σ = 530069776649280. Its totient is φ = 68151585790080.

The previous prime is 204455121324431. The next prime is 204455121324521. The reversal of 204455121324516 is 615423121554402.

204455121324516 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 5 + 5 + 121 + 3 + 2 + 4 + 516 = 666.

It is a super-3 number, since 3×204455121324516³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75602940 + ... + 78260556.

It is an arithmetic number, because the mean of its divisors is an integer number (11043120346860).

Almost surely, 2^{204455121324516} is an apocalyptic number.

It is an amenable number.

204455121324516 is an abundant number, since it is smaller than the sum of its proper divisors (325614655324764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204455121324516 is a wasteful number, since it uses less digits than its factorization.

204455121324516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369961 (or 3369953 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

Adding to 204455121324516 its reverse (615423121554402), we get a palindrome (819878242878918).

The spelling of 204455121324516 in words is "two hundred four trillion, four hundred fifty-five billion, one hundred twenty-one million, three hundred twenty-four thousand, five hundred sixteen".