204515355660 has 192 divisors, whose sum is σ = 714503946240. Its totient is φ = 42463399680.

The previous prime is 204515355659. The next prime is 204515355677. The reversal of 204515355660 is 66553515402.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6114061 + ... + 6147419.

It is an arithmetic number, because the mean of its divisors is an integer number (3721374720).

Almost surely, 2^204515355660 is an apocalyptic number.

204515355660 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 204515355660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357251973120).

204515355660 is an abundant number, since it is smaller than the sum of its proper divisors (509988590580).

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

204515355660 is a wasteful number, since it uses less digits than its factorization.

204515355660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34716 (or 34714 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 204515355660 in words is "two hundred four billion, five hundred fifteen million, three hundred fifty-five thousand, six hundred sixty".