201717204040 has 64 divisors (see below), whose sum is σ = 500026374720. Its totient is φ = 72625440000.

The previous prime is 201717204023. The next prime is 201717204043. The reversal of 201717204040 is 40402717102.

It is not an unprimeable number, because it can be changed into a prime (201717204043) by changing a digit.

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, 2225106 + ... + 2313985.

It is an arithmetic number, because the mean of its divisors is an integer number (7812912105).

Almost surely, 2^201717204040 is an apocalyptic number.

201717204040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201717204040 is an abundant number, since it is smaller than the sum of its proper divisors (298309170680).

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

201717204040 is a wasteful number, since it uses less digits than its factorization.

201717204040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539214 (or 4539210 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The spelling of 201717204040 in words is "two hundred one billion, seven hundred seventeen million, two hundred four thousand, forty".