201982905660 has 192 divisors, whose sum is σ = 582410207232. Its totient is φ = 52280976384.

The previous prime is 201982905601. The next prime is 201982905689. The reversal of 201982905660 is 66509289102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 261297034 + ... + 261297806.

It is an arithmetic number, because the mean of its divisors is an integer number (3033386496).

Almost surely, 2^201982905660 is an apocalyptic number.

201982905660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201982905660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291205103616).

201982905660 is an abundant number, since it is smaller than the sum of its proper divisors (380427301572).

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

201982905660 is a wasteful number, since it uses less digits than its factorization.

201982905660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 201982905660 in words is "two hundred one billion, nine hundred eighty-two million, nine hundred five thousand, six hundred sixty".