206499805440 has 288 divisors, whose sum is σ = 671318409216. Its totient is φ = 54089441280.

The previous prime is 206499805439. The next prime is 206499805513. The reversal of 206499805440 is 44508994602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50228985 + ... + 50233095.

Almost surely, 2^206499805440 is an apocalyptic number.

206499805440 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 206499805440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335659204608).

206499805440 is an abundant number, since it is smaller than the sum of its proper divisors (464818603776).

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

206499805440 is a wasteful number, since it uses less digits than its factorization.

206499805440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365 (or 4351 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 206499805440 in words is "two hundred six billion, four hundred ninety-nine million, eight hundred five thousand, four hundred forty".