206650623640 has 16 divisors (see below), whose sum is σ = 464963903280. Its totient is φ = 82660249440.

The previous prime is 206650623623. The next prime is 206650623649. The reversal of 206650623640 is 46326056602.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 5166265591 = 206650623640 / (2 + 0 + 6 + 6 + 5 + 0 + 6 + 2 + 3 + 6 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 206650623593 and 206650623602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206650623649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2583132756 + ... + 2583132835.

It is an arithmetic number, because the mean of its divisors is an integer number (29060243955).

Almost surely, 2^206650623640 is an apocalyptic number.

206650623640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206650623640 is an abundant number, since it is smaller than the sum of its proper divisors (258313279640).

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

206650623640 is a wasteful number, since it uses less digits than its factorization.

206650623640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5166265602 (or 5166265598 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 206650623640 in words is "two hundred six billion, six hundred fifty million, six hundred twenty-three thousand, six hundred forty".