206390856448 has 144 divisors (see below), whose sum is σ = 489523152384. Its totient is φ = 85005803520.

The previous prime is 206390856433. The next prime is 206390856461. The reversal of 206390856448 is 844658093602.

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, 4901661 + ... + 4943587.

It is an arithmetic number, because the mean of its divisors is an integer number (3399466336).

Almost surely, 2^206390856448 is an apocalyptic number.

206390856448 is a gapful number since it is divisible by the number (28) 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 206390856448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244761576192).

206390856448 is an abundant number, since it is smaller than the sum of its proper divisors (283132295936).

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

206390856448 is an equidigital number, since it uses as much as digits as its factorization.

206390856448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42058 (or 42044 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 206390856448 in words is "two hundred six billion, three hundred ninety million, eight hundred fifty-six thousand, four hundred forty-eight".