204454663040 has 64 divisors (see below), whose sum is σ = 490159600560. Its totient is φ = 81550098432.

The previous prime is 204454662983. The next prime is 204454663043. The reversal of 204454663040 is 40366454402.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 204454662985 and 204454663003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204454663043) 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, 226574 + ... + 678413.

Almost surely, 2^204454663040 is an apocalyptic number.

204454663040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204454663040 is an abundant number, since it is smaller than the sum of its proper divisors (285704937520).

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

204454663040 is an equidigital number, since it uses as much as digits as its factorization.

204454663040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905359 (or 905347 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 38.

The spelling of 204454663040 in words is "two hundred four billion, four hundred fifty-four million, six hundred sixty-three thousand, forty".