204645352560 has 80 divisors (see below), whose sum is σ = 692073383040. Its totient is φ = 49610993920.

The previous prime is 204645352517. The next prime is 204645352577. The reversal of 204645352560 is 65253546402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 38755950 + ... + 38761229.

It is an arithmetic number, because the mean of its divisors is an integer number (8650917288).

Almost surely, 2^204645352560 is an apocalyptic number.

204645352560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204645352560 is an abundant number, since it is smaller than the sum of its proper divisors (487428030480).

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

204645352560 is a wasteful number, since it uses less digits than its factorization.

204645352560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77517206 (or 77517200 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 204645352560 its reverse (65253546402), we get a palindrome (269898898962).

The spelling of 204645352560 in words is "two hundred four billion, six hundred forty-five million, three hundred fifty-two thousand, five hundred sixty".