204454055515 has 4 divisors (see below), whose sum is σ = 245344866624. Its totient is φ = 163563244408.

The previous prime is 204454055483. The next prime is 204454055539. The reversal of 204454055515 is 515550454402.

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 204454055515 - 2⁵ = 204454055483 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 20445405547 + ... + 20445405556.

It is an arithmetic number, because the mean of its divisors is an integer number (61336216656).

Almost surely, 2^204454055515 is an apocalyptic number.

204454055515 is a deficient number, since it is larger than the sum of its proper divisors (40890811109).

204454055515 is an equidigital number, since it uses as much as digits as its factorization.

204454055515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40890811108.

The product of its (nonzero) digits is 400000, while the sum is 40.

The spelling of 204454055515 in words is "two hundred four billion, four hundred fifty-four million, fifty-five thousand, five hundred fifteen".