204242163455 has 8 divisors (see below), whose sum is σ = 267371559504. Its totient is φ = 148539755200.

The previous prime is 204242163451. The next prime is 204242163473. The reversal of 204242163455 is 554361242402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204242163455 - 2² = 204242163451 is a prime.

It is a super-2 number, since 2×204242163455² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204242163451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856746886 + ... + 1856746995.

It is an arithmetic number, because the mean of its divisors is an integer number (33421444938).

Almost surely, 2^204242163455 is an apocalyptic number.

204242163455 is a deficient number, since it is larger than the sum of its proper divisors (63129396049).

204242163455 is a wasteful number, since it uses less digits than its factorization.

204242163455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713493897.

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 204242163455 in words is "two hundred four billion, two hundred forty-two million, one hundred sixty-three thousand, four hundred fifty-five".