204115315540 has 48 divisors (see below), whose sum is σ = 429344193600. Its totient is φ = 81512533760.

The previous prime is 204115315499. The next prime is 204115315561. The reversal of 204115315540 is 45513511402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40027911 + ... + 40033009.

It is an arithmetic number, because the mean of its divisors is an integer number (8944670700).

Almost surely, 2^204115315540 is an apocalyptic number.

204115315540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204115315540 is an abundant number, since it is smaller than the sum of its proper divisors (225228878060).

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

204115315540 is a wasteful number, since it uses less digits than its factorization.

204115315540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7992 (or 7990 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 204115315540 its reverse (45513511402), we get a palindrome (249628826942).

The spelling of 204115315540 in words is "two hundred four billion, one hundred fifteen million, three hundred fifteen thousand, five hundred forty".