204129440660 has 48 divisors (see below), whose sum is σ = 433091183616. Its totient is φ = 80814196992.

The previous prime is 204129440617. The next prime is 204129440689. The reversal of 204129440660 is 66044921402.

It is a super-2 number, since 2×204129440660² (a number of 23 digits) contains 22 as substring.

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, 647069 + ... + 909371.

It is an arithmetic number, because the mean of its divisors is an integer number (9022732992).

Almost surely, 2^204129440660 is an apocalyptic number.

204129440660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204129440660 is an abundant number, since it is smaller than the sum of its proper divisors (228961742956).

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

204129440660 is a wasteful number, since it uses less digits than its factorization.

204129440660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262712 (or 262710 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 204129440660 in words is "two hundred four billion, one hundred twenty-nine million, four hundred forty thousand, six hundred sixty".