204142643346465 has 24 divisors (see below), whose sum is σ = 353847782940288. Its totient is φ = 108875911998240.

The previous prime is 204142643346361. The next prime is 204142643346571. The reversal of 204142643346465 is 564643346241402.

204142643346465 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 4 + 264 + 334 + 6 + 46 + 5 = 666.

It is not a de Polignac number, because 204142643346465 - 2³⁰ = 204141569604641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30357960 + ... + 36467670.

It is an arithmetic number, because the mean of its divisors is an integer number (14743657622512).

Almost surely, 2^{204142643346465} is an apocalyptic number.

It is an amenable number.

204142643346465 is a deficient number, since it is larger than the sum of its proper divisors (149705139593823).

204142643346465 is a wasteful number, since it uses less digits than its factorization.

204142643346465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6852229 (or 6852226 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 54.

Adding to 204142643346465 its reverse (564643346241402), we get a palindrome (768785989587867).

The spelling of 204142643346465 in words is "two hundred four trillion, one hundred forty-two billion, six hundred forty-three million, three hundred forty-six thousand, four hundred sixty-five".