204307513455540 has 144 divisors (see below), whose sum is σ = 629180874818496. Its totient is φ = 49498649333760.

The previous prime is 204307513455497. The next prime is 204307513455569. The reversal of 204307513455540 is 45554315703402.

204307513455540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 204307513455540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3163732 + ... + 20460308.

It is an arithmetic number, because the mean of its divisors is an integer number (4369311630684).

Almost surely, 2^{204307513455540} is an apocalyptic number.

204307513455540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204307513455540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314590437409248).

204307513455540 is an abundant number, since it is smaller than the sum of its proper divisors (424873361362956).

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

204307513455540 is a wasteful number, since it uses less digits than its factorization.

204307513455540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17298238 (or 17298225 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 48.

The spelling of 204307513455540 in words is "two hundred four trillion, three hundred seven billion, five hundred thirteen million, four hundred fifty-five thousand, five hundred forty".