204611515240 has 64 divisors (see below), whose sum is σ = 503843483520. Its totient is φ = 74164896000.

The previous prime is 204611515219. The next prime is 204611515243. The reversal of 204611515240 is 42515116402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (204611515243) 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 15 ways as a sum of consecutive naturals, for example, 610791 + ... + 884470.

It is an arithmetic number, because the mean of its divisors is an integer number (7872554430).

Almost surely, 2^204611515240 is an apocalyptic number.

204611515240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204611515240 is an abundant number, since it is smaller than the sum of its proper divisors (299231968280).

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

204611515240 is a wasteful number, since it uses less digits than its factorization.

204611515240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495594 (or 1495590 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 204611515240 in words is "two hundred four billion, six hundred eleven million, five hundred fifteen thousand, two hundred forty".