206012961840 has 320 divisors, whose sum is σ = 788585241600. Its totient is φ = 44318453760.

The previous prime is 206012961769. The next prime is 206012961863. The reversal of 206012961840 is 48169210602.

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, 1325835 + ... + 1473045.

It is an arithmetic number, because the mean of its divisors is an integer number (2464328880).

Almost surely, 2^206012961840 is an apocalyptic number.

206012961840 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 206012961840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394292620800).

206012961840 is an abundant number, since it is smaller than the sum of its proper divisors (582572279760).

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

206012961840 is a wasteful number, since it uses less digits than its factorization.

206012961840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147265 (or 147245 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 206012961840 in words is "two hundred six billion, twelve million, nine hundred sixty-one thousand, eight hundred forty".