204440464509 has 8 divisors (see below), whose sum is σ = 288621832320. Its totient is φ = 128276369856.

The previous prime is 204440464477. The next prime is 204440464559. The reversal of 204440464509 is 905464044402.

It is a happy number.

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

It is not a de Polignac number, because 204440464509 - 2⁵ = 204440464477 is a prime.

It is a super-2 number, since 2×204440464509² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204440464559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2004318229 + ... + 2004318330.

It is an arithmetic number, because the mean of its divisors is an integer number (36077729040).

Almost surely, 2^204440464509 is an apocalyptic number.

It is an amenable number.

204440464509 is a deficient number, since it is larger than the sum of its proper divisors (84181367811).

204440464509 is a wasteful number, since it uses less digits than its factorization.

204440464509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4008636579.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 204440464509 in words is "two hundred four billion, four hundred forty million, four hundred sixty-four thousand, five hundred nine".