204194640129560 has 64 divisors (see below), whose sum is σ = 479421353534400. Its totient is φ = 78125365559296.

The previous prime is 204194640129553. The next prime is 204194640129593. The reversal of 204194640129560 is 65921046491402.

It is a Cunningham number, because it is equal to 14289669²-1.

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, 55372472 + ... + 58944888.

It is an arithmetic number, because the mean of its divisors is an integer number (7490958648975).

Almost surely, 2^{204194640129560} is an apocalyptic number.

204194640129560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204194640129560 is an abundant number, since it is smaller than the sum of its proper divisors (275226713404840).

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

204194640129560 is a wasteful number, since it uses less digits than its factorization.

204194640129560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634580 (or 3634576 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 204194640129560 in words is "two hundred four trillion, one hundred ninety-four billion, six hundred forty million, one hundred twenty-nine thousand, five hundred sixty".