204256705660 has 24 divisors (see below), whose sum is σ = 490216093920. Its totient is φ = 70030870464.

The previous prime is 204256705619. The next prime is 204256705663. The reversal of 204256705660 is 66507652402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204256705663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729488095 + ... + 729488374.

It is an arithmetic number, because the mean of its divisors is an integer number (20425670580).

Almost surely, 2^204256705660 is an apocalyptic number.

204256705660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204256705660 is an abundant number, since it is smaller than the sum of its proper divisors (285959388260).

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

204256705660 is a wasteful number, since it uses less digits than its factorization.

204256705660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458976485 (or 1458976483 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 204256705660 in words is "two hundred four billion, two hundred fifty-six million, seven hundred five thousand, six hundred sixty".